Panasonic Projector PT-DS20KE User Manual

							Technical information
ENGLISH - 171
Appendix
3D compatible signal Resolution
(Dots) Scanning 
frequencyDot clock 
frequency (MHz)RGB1/RGB2 SDI1/SDI2HDMI
&
DVI-D RGB1
&
RGB2SDI1 &
SDI2
Horizontal (kHz) Vertical
(Hz)(2)*1(3) (4) (5) (2)*1(3) (4) (6)*3(7) (7) (7)
1366 x 768 1 366 x 768 47.7  59.8  85.5 3― ― ― ― ― ― ― ― ― ―
1 366 x 768 39.6 49.9 69.0
3― ― ― ― ― ― ― ― ― ―
SXGA+ 1 400 x 1 050 54.1  50.0  99.9 
3― ― ― ― ― ― ―3 3―
1 400 x 1 050 64.0  60.0  108.0 
3― ― ― ― ― ― ―3 3―
1 400 x 1 050 65.2  60.0  122.6 
3― ― ― ― ― ― ―3 3―
1 400 x 1 050 65.3  60.0  121.8 
3― ― ― ― ― ― ―3 3―
WXGA+ 1 440 x 900 55.9  59.9  106.5 
3― ― ― ― ― ― ― ― ― ―
1 440 x 900 46.3 49.9  86.8
3― ― ― ― ― ― ― ― ― ―
UXGA60 1 600 x 1 200 75.0  60.0  162.0 
3― ― ― ― ― ― ― ― ― ―
WSXGA+ 1 680 x 1 050 65.3  60.0  146.3 
3― ― ― ― ― ― ― ― ― ―
1 680 x 1 050 54.1 50.0 119.5
3― ― ― ― ― ― ― ― ― ―
1920 x 1080 1 920 x 1 080 55.6  49.9  141.5 
3― ― ― ― ― ― ― ― ― ―
1 920 x 1 080
*266.6  59.9  138.5 3― ― ― ― ― ― ― ― ― ―
WUXGA 1 920 x 1 200 61.8  49.9  158.3 
3― ― ― ― ― ― ―3 3―
1 920 x 1 200
*274.0  60.0  154.0 3―3― ― ― ― ―3 3―
*1:
 
Supports half.
*2:

 
VESA

 CVT-RB (Reduced Blanking) compatible
*3:
 
Only supports SDI 1 
						

							Specifications
172 - ENGLISH
Appendix
The following table describes the specifications of the projector.
Model No.PT-DZ21KE PT-DS20KEPT-DW17KE
Power supply AC 200 V - 240 V 50 Hz/60 Hz
Power consumption 2 300 W (12 A) 
(0.3 W when standby mode is set to [ECO], and 9 W when set to [NORMAL])
DLP chips Panel size
24.4 mm (0.96") 
(aspect ratio 16:10) 24.1 mm (0.95") 
(aspect ratio 4:3) 21.6 mm (0.85") 
(aspect ratio 16:9)
Display method 3-unit DLP chips, DLP type
Number of pixels 2 304 000 pixels
(1 920 x 1 200 dots) x 3 panels 1 470 000 pixels
(1 400 x 1 050 dots) x 3 panels 1 049 088 pixels
(1 366 x 768 dots) x 3 panels
Lens Optional
Luminous lamp 465 W UHM lamp x 4
Light output 
*120 000 lm (ANSI) 17 000 lm (ANSI)
Applicable 
scanning 
frequency 
*2
For RGB signalHorizontal: 15 kHz to 100 kHz, Vertical: 24 Hz to 120 Hz
PIAS (Panasonic Intelligent Auto Scanning) system
Dot clock frequency162 MHz or less
For YC
BCR/YPBPR 
signals [480i] H: 15.73 kHz, V: 59.94 Hz
[480p] H: 31.5 kHz, V: 59.94 Hz
[720/50p] H: 37.5 kHz, V: 50 Hz
[1035/60i] H: 33.75 kHz, V: 60 Hz
[1080/60i] H: 33.75 kHz, V: 60 Hz
[1080/25p] H: 28.13 kHz, V: 25 Hz
[1080/30p] H: 33.75 kHz, V: 30 Hz
[1080/50p] H: 56.25 kHz, V: 50 Hz [576i] H: 15.63 kHz, V: 50 Hz
[576p] H: 31.25 kHz, V: 50 Hz
[720/60p] H: 45 kHz, V: 60 Hz
[1080/50i] H: 28.13 kHz, V: 50 Hz
[1080/24p] H: 27 kHz, V: 24 Hz
[1080/24sF] H: 27 kHz, V: 48 Hz
[1080/60p] H: 67.5 kHz, V: 60 Hz
 z
The HD/SYNC and VD terminals do not support 3 value SYNC.
For video signals
(including 

Y/C 
signals) Horizontal: 15.75 kHz/15.63 kHz, Vertical: 50 Hz/60 Hz
For DVI-D signal
For HDMI signal 480p, 576p, 720/60p, 720/50p, 1080/60p, 1080/50p, 1080/60i, 1080/50i, 1080/24sF
, 1080/30p, 
1080/25p, 1080/24p
 z Displayable resolution: VGA

 to WUXGA (non-interlaced)
 zDot clock frequency: 25 MHz to 162 MHz
For SDI signal [SD-SDI signal]
SMPTE ST

 259 compliant
[YC
BCR 4:2:2 10-bit]
480i, 576i
—
[Single link HD-SDI signal] SMPTE ST 292 compliant
[YP
BPR 4:2:2 10-bit]
720/50p, 720/60p, 1035/60i, 
1080/50i, 1080/60i, 1080/25p, 
1080/24p, 1080/24sF, 1080/30p
[Dual link HD-SDI signal] SMPTE ST 372 compliant [RGB 4:4:4 12-bit/10-bit]
1080/50i, 1080/60i, 1080/25p, 
1080/24p, 1080/24sF, 1080/30p, 
[X’Y’Z’ 4:4:4 12-bit]
2048 x 1080/24p, 
2048 x 1080/24sF
[3G-SDI signal] SMPTE ST 424 compliant
[YP
BPR 4:2:2 10-bit]
1080/50p, 1080/60p
[RGB 4:4:4 12-bit/10-bit]
1080/50i, 1080/60i, 1080/25p, 
1080/24p, 1080/24sF, 1080/30p
 z The 3G-SDI signal is only compatible with SDI 1.
Color system 7 standards (NTSC/NTSC4.43/P

AL/PAL-N/PAL-M/SECAM/PAL60)
Projection screen size 1.78 m (70") - 15.24 m (600")
*3
Screen aspect ratio16:104:316:9
Projection method FRONT CEILING/FRONT FLOOR/REAR CEILING/REAR FLOOR
Specifications 
						

							Specifications
ENGLISH - 173
Appendix
Model No.PT-DZ21KE PT-DS20KEPT-DW17KE
Contrast ratio 10 000:1 (when [DYNAMIC IRIS] is set to [3])
Terminals  
terminal
1 set (BNC x 5 (RGB/YP
BPR/YCBCR/YC x 1))
[RGB signal] 0.7 V [p-p] 75 Ω (SYNC ON GREEN: 1.0 V [p-p] 75 Ω)
HD/SYNC TTL high impedance, automatic positive/negative 
polarity compatible
VD TTL high impedance, automatic positive/negative polarity 
compatible
[YP
BPR signal] Y: 1.0 V [p-p] including synchronization signal, PBPR: 0.7 V [p-p] 
75 Ω
[Y/C signal] Y: 1.0 V [p-p], C: 0.286 V [p-p] 75 Ω
 
terminal 1 set, high-density D-Sub 15p (female)
[RGB signal]
0.7 V [p-p] 75 Ω (SYNC ON GREEN: 1.0 V [p-p] 75 Ω)
HD/SYNC TTL high impedance, automatic positive/negative 
polarity compatible
VD TTL high impedance, automatic positive/negative polarity 
compatible
[YP
BPR signal] Y: 1.0 V [p-p] including synchronization signal, PBPR: 0.7 V [p-p] 
75 Ω
 
terminal 1 set, BNC 1.0 V [p-p] 75 Ω
 
terminal 1 set, DVI-D 24 p single link, DVI 1.0 compatible, HDCP compliant
 
terminal 1 set, HDMI 19 pin, (HDCP and Deep color compatible)
 
terminal 1 set (BNC)
—
[SD-SDI signal]
SMPTE ST 259 compliant
[HD-SDI signal] SMPTE ST 292 compliant
[3G-SDI signal] SMPTE ST 424 compliant
[Dual link HD-SDI (LINK-A) 
signal] SMPTE ST 372 compliant
 
terminal 1 set (BNC)
—
[SD-SDI signal]
SMPTE ST 259 compliant
[HD-SDI signal] SMPTE ST 292 compliant
[Dual link HD-SDI (LINK-B) 
signal] SMPTE ST 372 compliant
 terminal 1 set (BNC)
—
During input setting  TTL high impedance
During output setting  TTL output  max. 10 mA
 
terminal 1 set (BNC)
—
TTL output  max. 10mA
/ 
 
terminal D-Sub 9 p, each set, RS-232C compatible, for computer control
/ 
 
terminal M3 stereo mini jack, each set, remote control for serial control
 
terminal 1 set D-Sub 9 p for contact control
 terminal 1 set, (for RJ-45 network connection, PJLink compatible, 10Base-T/100Base-TX)
Power cable length 3.0 m (118-1/8")
Outer case Molded plastic 
						

							Specifications
174 - ENGLISH
Appendix
Model No.PT-DZ21KE PT-DS20KEPT-DW17KE
Dimensions Width: 620 mm (24-13/32"), Height: 255 mm (10-1/32") (excluding the legs), 
Depth: 730 mm (28-3/4") (excluding the projection lens cover)
Weight Approx 43.0 kg
 (94.8 lbs.)
*4
Operating environment Operating environment temperature*5: 0°C (32°F) to 45°C (113°F)
Operating environment humidity: 10% to 80% (no condensation)
Remote 
control Power supply
DC 3 V (AA/R6 battery x 2)
Operating range Approx. 30 m (98'5") (when operated directly in front of signal receiver)
Weight 134 g
 (4.7 ozs.) (including batteries)
Dimensions Width: 51 mm (2"), Height: 176 mm (6-15/16"), Depth: 28 mm (1-3/32")
*1:
 
Measurement, measuring conditions and method of notation all comply with ISO21 1

18 international standards.
*2:
 
Refer to “List of compatible signals” ( page 167) for the types of video signals that can be used with the projector.
*3:
 1.78 m - 7.62 m (70" - 300") when ET
-D75LE5, ET-D75LE50 projection lens is attached.
*4:
 
A

verage value. Weight varies for each product.
*5:
 
When using the projector at high elevations 1 400 m (4 593 ft) – 2 700 m (8 858 ft) from sea level, operating environment 
temperature will be 0°C (32°F) to 40°C (104°F).
When using a smoke cut filter

, the temperature will be 0°C (32°F) to 35°C (95°F). However, it cannot be used at high elevations.
When using the replacement lamp unit (for portrait mode), the operating environment temperature will be 0°C (32°F) to 40°C 
(104°F); when using it at high altitudes 1 400 m (4 593 ft) – 2 700 m (8 858 ft) from sea level, the operating environment 
temperature will be 0°C (32°F) to 35°C (95°F); when using it with a smoke cut filter , the operating environment temperature will 
be 0°C (32°F) to 30°C (86°F).
 z The part numbers of accessories and separately sold components are subject to change without notice. 
						

							Dimensions
ENGLISH - 175
Appendix
Dimensions
36
(1-13/32)
620
(24-13/32)
177(6-31/32)
291 (11-15/32)
70
(2-3/4) 730 (28-3/4)
Uni\f: mm
*
 
Actual dimensions may dif

fer depending on the product. 
						

							Ceiling mount bracket safeguards
176 - ENGLISH
Appendix
 zWhen installing the projector to a ceiling, be sure to use the specified ceiling mount bracket (Model No.: 
ET
-PKD510H (for high ceilings), ET-PKD510S (for low ceilings)).
 zWhen installing the projector

, attach the drop-prevention set included with the ceiling mount bracket to the 
projector.
If you need the drop-prevention set (hex bolt with washer (M10 x 40), wire rope: TTRA0143) separately, consult 
your dealer.
 z Request for a qualified technician to do the installation.
 zPanasonic takes no responsibility for any damage to the projector resulting from use of a ceiling mount bracket 
not manufactured by Panasonic or the inappropriate choice of location for installation, even if the warranty 
period of the projector has not expired.
 zUnused products must be removed promptly by a qualified technician.
 zReferring to the screw holes for ceiling mount diagram below

, use screws of sufficient length to reach the 
imbedded nuts.
 z Use a torque screwdriver or 

Allen torque wrench to tighten bolts to their specified tightening torques. Do not 
use tools such as electric screwdrivers or impact screwdrivers.
 z For details, read the installation manual that comes with the ceiling mount bracket.
 zThe part numbers of accessories and separately sold components are subject to change without notice.
110(4-11/32)145
(5-23/32)
48
(1-7/8)
298 (11-23/32)
548 (21-9/16)
25 mm (31/32)
12 mm (15/32) 12 mm (15/32)
30 mm (1-3/16)
30 mm (1-3/16)
110(4-11/32)135.5
(5-11/32) 145
(5-23/32)
110(4-11/32)
M6
M6
\fottom v\bew Model No. of ce\bl\bng \Mmount bracket:  ET-PKD510H (for h\bg\Mh ce\bl\bngs)
ET-PKD510S (for lo\Mw ce\bl\bngs)
Torque: 4 ± 0.5 N·\Mm Screw holes for ce\M\bl\bng mount
Screw hole depth
Max. screw hole dep\Mth
Max. screw hole dep\Mth Embedded nut
(Screw hole depth)Space
Un\bt: mm
Ceiling mount bracket safeguards 
						

							Index
ENGLISH - 177
Appendix
Index
Numerics[3D COLOR MATCHING] ……………………… 84
[3D FRAME DELA Y]  …………………………… 86
[3D INPUT
 FORMAT]  
…………………………… 84
[3D PICTURE BALANCE]

 
……………………… 85
[3D SAFETY

 PRECAUTIONS]  
………………… 87
[3D SETTINGS] …………………………… 63,

  82
[3D SIMUL INPUT SETTING]…………………… 83
[3D SYNC SETTING]
 …………………………… 82
[3D SYSTEM SETTING] ………………………… 82
[3D 

TEST MODE]  
………………………………… 86
[3D 

TEST PATTERN]  
…………………………… 86
AAccessories ……………………………………… 19
 terminal  …………………………… 24,   48
Adjustable feet
 …………………………………… 42
[ADV

ANCED MENU]  
……………………… 63,
   77
Air filter unit
 
………………………………………144
Air filter unit compartment ………………………146
[ASPECT]

 
………………………………………… 72
 button Remote control
 ………………………… 22,

  60
Aspect function
 
…………………………………… 60
Attaching/removing the projection lens ………… 43
Automatic setup function ………………………… 59
[AUT

O SETUP]
 …………………………………… 91
 button
Projector body
 ………………………… 25,

  59
Remote control
 ………………………… 22,

  59
[AUTO SIGNAL]
 ………………………………… 90
B[BACK COLOR] ………………………………… 95
[BLANKING]  ……………………………………… 77
[BRIGHTNESS]
 
………………………………… 66
[BRIGHTNESS CONTROL]

 
……………………102
CCautions on use ………………………………… 18
Cautions when installing ………………………… 15
Cautions when transporting …………………… 15
Ceiling mount bracket ……………………………176
Ceiling mount bracket safeguards ………………176
[CLAMP

 POSITION]
 …………………………… 78
[CLOCK PHASE]

 
………………………………… 74
[COLOR]

 
………………………………………… 66
[COLOR MA

TCHING]  
…………………………… 88
[COLOR 

TEMPERATURE]  
……………………… 66
Connecting the power cord ……………………… 48
Connection ……………………………………… 44
[CONTRAST]

 
…………………………………… 66[CONTROL DEVICE PASSWORD CHANGE] …124
[CONTROL
 DEVICE SETUP]
 …………………122
[COOLING CONDITION] ………………………100
[CUT

 OFF]
 ………………………………………… 98
D[DARK TIME SETTING] ………………………… 85
[DA TE AND TIME] ……………………………… 1 10
 button Remote control
 ………………………… 22,

  62
Deleting a registered data
 ……………………… 1

18
[DIGITAL CINEMA REALITY]
 
…………………… 77
Dimensions ………………………………………175
Display language …………………………… 63,

  81
[DISPLAY OPTION]
 ………………………… 64,

  88
[DISPLAY SETTING]
 ……………………………122
Disposal …………………………………………… 18
 button Projector body
 ………………………… 25,

  58
Remote control
 ………………………… 22,

  58
[DVI-D IN]
 
………………………………………… 92
[DYNAMIC IRIS]

 
………………………………… 69
E[EDGE BLENDING] ……………………………… 78
 button Projector body
 ……………………………… 25
Remote control ……………………………… 22
Expanding signal lock-in range ………………… 1

19
FFilter indicator ……………………………………143
 button Remote control
 ………………………… 22,

  52
[FRAME LOCK]
 
………………………………… 80
[FRAME RESPONSE]

 
…………………………… 80
[FREEZE] ………………………………………… 96
 button Remote control
 ………………………… 22,

  59
Function button
 ……………………………… 59,

  110
G[GAMMA] ………………………………………… 68
[GEOMETR Y]  …………………………………… 74
H buttonProjector body ………………………… 25,   58
Remote control
 ………………………… 22,

  58
[HDMI IN]
 
………………………………………… 93
[HIGH 

ALTITUDE MODE]
 ………………………100
I buttonRemote control ………………………… 22,   27
 button
Remote control
 ………………………… 22,

  27
[INITIALIZE]
 ……………………………………… 1

14
Initial setting
 ……………………………………… 21
[INPUT

 RESOLUTION]  
………………………… 78
Input selection terminal indicator ……………… 25
K[KEYSTONE] ……………………………………… 76
LLamp indicator ……………………………………142
[LAMP  RELAY]  ……………………………………101
[LAMP
 SELECT]  
…………………………………100
Lamp unit cover ………………………………… 24
[LARGE SCREEN CORRECTION]

 
…………… 89
[LEFT/RIGHT

 SWAP]  
…………………………… 84
 button Projector body
 ………………………… 25,

  52
[LENS CALIBRATION]
 
………………………… 1
 11
[LENS MEMORY]
 
………………………………… 1
 12
 button Remote control
 ……………………………… 22
 switch
Projector body
 ……………………………… 25
List of compatible signals ………………………167
[LOAD 

ALL USER DATA]  
……………………… 1
 13
 button Remote control
 ……………………………… 23MMain menu ………………………………………… 62
Main power switch ………………………… 24,   50
Maintenance
 ………………………………………144
Managing the sub memory list …………………120
 button Projector body
 ………………………… 25,

  61
Remote control
 ………………………… 22,

  61
Menu item
 
………………………………………… 63
NNavigating through the menu …………………… 61
[NETWORK] ………………………………… 64,   125
Network connections
 ……………………………126
[NETWORK CONTROL] …………………………125
[NETWORK SETUP] ……………………………125
[NETWORK ST

ATUS]  
……………………………125
[NOISE REDUCTION]

 
…………………………… 69
[NO SIGNAL

 SHUT-OFF]
 ……………………… 1
 10
O buttonRemote control ………………………… 22,   58
[ON-SCREEN DISPLAY]
 
………………………… 94
On-screen menu ………………………………… 61
Optional accessories …………………………… 20
P[PICTURE] …………………………………… 63,   65
[PICTURE MODE]  ……………………………… 65
[P
 IN P]
 ……………………………………… 64,
   115P IN P function
 
…………………………………… 1
 15
[POSITION]
 ………………………………… 63,   72
Power cord ……………………………………… 48
Power indicator  ………………………………… 49
Power on button Projector body
 ……………………………… 25
Remote control ……………………………… 22
Power standby button
Projector body
 ……………………………… 25
Remote control ……………………………… 22
Precautions for use ……………………………… 15
Projecting ………………………………………… 52
[PROJECTION METHOD] ………………… 28,

  99
Projector body
 …………………………………… 24
[PROJECT

OR ID]  
………………………………… 99
[PROJECT

OR SETUP]  
…………………… 64,
   99
Protecting a registered data
 …………………… 1

19
R[RASTER POSITION] …………………………… 80
Read this first!  ……………………………………… 2
Registering a signal to the list ………………… 1

18
 terminal
 
……………………… 27
 terminal

 
…………………… 27
 terminal

 
………………………164
[REMOTE2 MODE] ……………………………… 1

10
Remote control
 …………………………………… 22
Remote control operations ……………………… 58
Renaming the registered data ………………… 1

18
Replacing the air filter unit
 ………………………146
Replacing the lamp unit …………………………148
Replacing the unit…………………………………146
Resetting to the factory default

 
………………… 62
 button Projector body
 ………………………… 25,

  58
Remote control
 ………………………… 22,

  58
 button
Projector body
 ………………………… 25,

  58
Remote control
 ………………………… 22,

  58
[RGB IN]…………………………………………… 92
[RS-232C]
 
………………………………… 108,
   160
S[SAFETY PRECAUTIONS MESSAGE] ……… 87
[SA VE ALL USER DATA]  ………………………… 1 13
[SCHEDULE]………………………………………106
[SCREEN SETTING]
 …………………………… 90
 button Projector body
 ………………………… 25,

  58
Remote control
 ………………………… 22,

  58
[SDI IN]
 …………………………………………… 93
Security

 
…………………………………………… 18
[SECURITY]

 
………………………………… 64,
   121
[SECURITY PASSWORD]
 
………………………121
[SECURITY

 PASSWORD CHANGE]  
…………121
Selecting the input signal ……………………… 52
Self-diagnosis display ……………………… 25,

  153
 terminal
 
……………………………160
 terminal  
…………………………160
[SER

VICE PASSWORD]  
………………………… 1
 14
Setting Remote control ID numbers
 …………… 27
Setting up

 
………………………………………… 28
[SHARPNESS]

 
…………………………………… 68
[SHIFT] …………………………………………… 72
 button Remote control
 ………………………… 22,

  52
 button
Projector body
 ………………………… 25,

  58
Remote control
 ………………………… 22,

  58
[SHUTTER SETTING]
 …………………………… 96
[SIGNAL

 LIST]
 ……………………………… 64,
   118
Specifications
 ……………………………………172
sRGB compliant images ………………………… 71
[ST

ANDBY MODE]  
………………………………106
[ST

ARTUP LOGO]
 ……………………………… 95
[ST

ATUS]  
…………………………………………109
 button
Remote control
 ………………………… 22,

  59
Switch input signal
 ……………………………… 58
Switch of

f the projector  
………………………… 51 
						

							Index
178 - ENGLISH
Appendix
Switch on the projector. ………………………… 50
[SYSTEM DA YLIGHT VIEW] …………………… 68
[SYSTEM SELECT
OR]  
………………………… 70
TTemperature indicator ……………………………143
 button Remote control
 ………………………… 22,

  60
[TEST PATTERN]
 
…………………………… 64,
   117
[TEXT CHANGE]
 
…………………………………122
[TINT] ……………………………………………… 66
T

roubleshooting
 …………………………………151
T

wo window display
 ………………………………165
U[UNIFORMITY] …………………………………… 95
Upgrade kit ………………………………………166
V button Projector body ………………………… 25,   58
Remote control
 ………………………… 22,

  58
W[WAVEFORM MONITOR] ……………………… 96
Z[ZOOM] …………………………………………… 73
 button Remote control
 ………………………… 22,

  52
  
						

							Information for Users on Collection and Disposal of Old Equipment and used Batteries
These symbols on the products, packaging, and/or accompanying documents mean that used 
electrical and electronic products and batteries should not be mixed with general household 
waste. For proper treatment, recovery and recycling of old products and used batteries, please 
take them to applicable collection points, in accordance with your national legislation and the 
Directives 2002/96/EC and 2006/66/EC.
By disposing of these products and batteries correctly, you will help to save valuable resources 
and prevent any potential negative effects on human health and the environment which could 
otherwise arise from inappropriate waste handling.
For more information about collection and recycling of old products and batteries, please contact 
your local municipality, your waste disposal service or the point of sale where you purchased the 
items.
Penalties may be applicable for incorrect disposal of this waste, in accordance with national 
legislation.
For business users in the European Union
If you wish to discard electrical and electronic equipment, please contact your dealer or supplier 
for further information.
Information on Disposal in other Countries outside the European Union
These symbols are only valid in the European Union. If you wish to discard these items, please 
contact your local authorities or dealer and ask for the correct method of disposal.
Note for the battery symbol (bottom two symbol examples):
This symbol might be used in combination with a chemical symbol. In this case it complies with 
the requirement set by the Directive for the chemical involved.
Panasonic Corporation
Web Site : http://panasonic.net/avc/projector/
© Panasonic Corporation 2012W0512YY1092 -YI
Environment care information for users in China
This symbol is only valid in China.