... backup & remote accessControl ModeFront panel, USB mouse, IR remote control, Keyboard, NetworkVideo & AudioIP Camera Input4ch@D1 / 2ch@720P / 1ch@1080P8ch@ ... Auxiliary InterfaceUSB Interface4 USB2.0 ports, For mouse control & backupRS232Dahua keyboard, PC communicationRS485PTZ controlEnvironmentalPower SupplyAC 100~240 V, 50/60 HzPower ... 480mm×440mm×100mm(W×D×H)Weight6.0KG(without HDD) cctv nvr system