タイトルまたは説明

HB-HV*1 model is the basic&economic SD card mobile DVR can support dual SD cards to 
Store the 4ch video and 4ch audio. The basic&economic model has the features of concise
Appearance, flexible installation. 

Features
4 video channels, 4 audio channels; 
H. **4 video compression; 
D1 or CIF resolution; 
Video storage in dual SD card, up to *4GB**4GB; 
USB, external trigger I/O supportable;