Costeffective Phone for Microsoft Teams Android 12 OS 4 inch 800 x 480 Capacitive Touch Screen Optimal HD audio, Yealink Noise Proof Technology Magnet Handset Dedicated Microsoft Teams Button Microsoft Teamstailored User Interface Supports Upgradability of Firmware to Teams or SFB Edition 1x USB 2.0 port for USB headsets, Bluetooth dongle and WiFi dongle Dualport Gigabit Ethernet Supports Microsoft/Yealink/Unify Square Device Management Platform Wall mountable IEEE 802.3af PoE support, without PSU