This 4-Channel USB 2.0 DVR Adapter is  an ideal design safety system for home/office/shop guard or baby care. 
Specification:
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Camera Inputs: 4 x Composite Video/RCA + 1 x Audio
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Audio format: 8 bit mono
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Maximum Display Frames per Second: 30fps (NTSC)    25fps (PAL)
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Maximum  Recording Frames per Second: 30fps (NTSC)    25fps (PAL)
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Compression Format: MPEG4
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Video Resolution: 704 x 576 (D1), 352 x 288 (PAL), 320 x 240 (NTSC)
 
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