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Name:D1 video control box
 ST503D is D1 video control box . it cannt support AHD/TVL/VGA signal. 
Description Parameters
 D1 video control box
Support 4CH  camera input and automatically segment the image
4CH camera can be triggered separately and displayed in full screen automatically
Priority display level CAM1/CAM2/CAM3/CAM4
Output power to cameras and LCD(12V)
Each image normal/mirror function can be set separately
Box working voltage :9V-32V
High and low voltage and overload protection 
Video output connector: RCA/4P aviation 
Support  audio output 
Can choose image of any channel of 4 cameras by trigger wire or hand
After cancelling trigger.the image is delayed for 2 sec. and returns to the state before the trigger
Support PAL/NTSC  video format 
Dimension: 155*87*32mm
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