Model No.	GD-SDA540	GD-SDA480	GD-SNDA420	GD-SPDA420
Resolution:	540TVL	480TVL	420TVL	420TVL
Image Sensor:	1/3"SONY Super HAD CCD	1/3"SONY Super HAD CCD	1/4"SONY Super HAD CCD	1/4"Sharp CCD
Pixels:	PAL: 795(H)×596(V), 752(H)×582(V),500(H)×582(V)
	NTSC: 811(H)×508(V), 768(H)×494(V), 510(H)×492(V)
TV System:	PAL/NTSC
Min Illumination:	0Lux
S/N Ratio:	≥ 48dB
Electronic Shutter:	1/50s(1/60s)-1/100,000s
Gamma Correction:	0.45
Gain Control:	Auto
White Balance:	Auto
Backlight compensation:	Auto
Sync System:	Internal Synchronization
Lens:	3.6mm/6mm/8mm/12mm Selectable
Video Output:	1.0vp-p.75Ω
IR Distance:	25m
Auto Switch:	Day/Night
Power Supply:	DC 12V/500MA
Current Consumption:	≤2.8W
Operating Temperature:	-10℃~+50℃