2-wire SIP Indoor unit (Linux Version)
7” capacitive touch screen with energy saving mode
Reception of a HD picture from the door communicator
Two-way communication based on SIP v0 protocol
Powered by Akuvox NS-2 or external source
Supports US or European electrical wall box mounting
Bluetooth, and Wireless feature
Support connecting with R20A-2 or NS-2 through 2-wire cable
