Product DescriptionFront panel: Plastic RAM / ROM: 64MB / 128MB Display: 7 Inch TFT LCD Screen: 7 Inch capacitive touch screen Wi-Fi: IEEE802.11 b/g/n, @2.4GHz RS485 port: Support Relay out: 1 Bell in: 1 I/O: 8 Microphone: -58dB Speaker: 4O / 2W 2-wire ports: 2 pair Ethernet ports: 1xRJ45, 10/100Mbps adaptive 48V DC connector (if not using NS-2) Installation: Wall-mounted & Desktop Dimension: 200.2x132.2x27.2mm Working Humidity: 1090% Working Temperature: -10°C +45°C Storage Temperature: -20°C +70°C