Core Features: 2.8 320 240-Pixel Color Lcd With Backlight Dual Usb Ports Dual Firmware Images Built-In Bluetooth 4.2 Built-In Dual Band 2.4G/5G Wi-Fi (802.11A/B/G/ N/Ac) T4U Auto-P Template Unified T4U Firmware Unified Up To 12 Sip Accounts Poe Support Usb Headset And Ehs Support Supports Color-Screen Expansion Modules Stand With 2 Adjustable Angles Wall Mountable Handset With Hall Switch