Color screen business phone 2.8 320x240 pixel display with backlight Linux 6.1 version; TEE hardware encryption solution Dual system function Auto-P template unified Unified firmware for T7X series (T73U, T73W, T74U, T74W, T77W), T85W, and T87W 2.8' 320x240 pixel display with backlight TEE hardware encryption solution Dual system function T7X Auto-P template unified Unified firmware for T7X series (T73U, T73W, T74U, T74W, T77U), T85W, and T87W Up to 12 SIP accounts PoE support Headset, EHS support Built-in Bluetooth, Wi-Fi Supports color-screen expansion modules Stand with 2 adjustable angles Wall mountable Handset with hall switch