... outVideo input : 4 channel CVBS(PAL/NTSC),BNC interface, adjustAudio input: 1 channel Audeo input(mono)Video Compression bit rate: video compression ... channel full screen or four channel division screen Local Storage: 8M SD , HDD optionRecord mode: Manual , alarm ,timed Audio intercom : One channel BNC ... and play with 3G SIM card, Relay Server will automatically connect according the unique preset DVS ...