... standalone dvr system 3.PTZ control 4.2*USB2.0 5.VGA output Resolution 1280*1024 8 channel 3G mobile dvr recorder ... operation of preview, recording, playback, network transmission, backup and mobile control.Chinese, English, Thai, Russian, French, Spanish,etc. ... 100MUSB Interface2,2*USB2.0RS485 Interface1 RS-485 interface (for PTZ control)GeneralPower Supply12V/3APower Consumption (without hard disk)≤ ...