1~4 channel wireless 3G bus DVR 1.H.264 format 2.1~ ... GPS are available 4.CIF,HD1,D1 resolution 1~4 channel wireless 3G bus DVRIntroduction1,Support 4CH video,CIF,HD1,D1 resolution ... other data in the video.3,Built-in GPS,3G wireless communication module,which achieve global positioning and real-time ... Director Member in Shenzhen Security&protection Industry Association 1~4 channel wireless 3G bus DVR