SDVR=DVR+NVR+HVR, Full D1 Realtime DVR, HDMI,3G&wifi, 16CH DVR 24CH NVR ... back upSpace occupationVideo:CIF 4~5G/day*channel, D1 16~20G/day*channel;audio:691.2M/day*channelVideo storageLocal HDD ,NetworkBack up modeNetwork ... controllerYesPower12V/4ADimension370(Length) x 285(Width) x 72(Height) 16CH Full D1 H.264 SDVR with HDMI, Cloud access