... Audio input, E-mail function,Support 3G mobile phone surve,12 languages. Item EN-1604ZSChannel8-channel4-channelVideo signalPAL (625 lines, 50f ... p-p/75,BNC connector×1,VGA×1Audio input1 x RACAudio output1 x RACAlarm input2-channel input. Trigger closed without Voltage,Open ... % Storage temperature:-20°C~+70°C;humility:< 95%Size255x 45 x 225mmWeightNG: 1.0kg GW:2.0Kg