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 ... and low speed alarm, manual button alarm and so on.8. Fully enclosed structure, waterproof and dustproof and lock design can ... Member in Shenzhen Security&protection Industry Association 1~4 channel wireless 3G bus DVR