At a Glance Ultra-clear, stylish appearance; Android 12 OS 7-inch capacitive touch screen with energy saving mode; Two-way audio communication with other units in the network; Complies with SIP standard for easy integration in every SIP capable PBXes; Powered by PoE or external source Support US or European electrical wall box mounting Physical & Power Front panel: Plastic OS：Android 12 RAM / ROM: 2GB / 8GB Display: 7 Inch TFT LCD Screen: 7 Inch capacitive touch screen Wi-Fi: IEEE802.11 b/g/n @2.4GHz Bluetooth: Bluetooth 4.2 RS485 port: Support  Relay out: 1 Bell in: 1 I/O: 8