The headset is certified for Microsoft Teams and UC, and is compatible with mainstream UC platforms, including Zoom, Google, cisco, avaya etc. Dect & Bluetooth hybrid dual-mode wireless headset, plug-and-play for multiple devices, including phones, computers and mobile phones. Dect technology has a longer wireless distance, up to 492, higher density deployment and safer calls. Bluetooth technology built-in wired headset allows mobile phones to be unrestricted, flexible office space, and can easily achieve multi-scenario applications such as hybrid working and mobile working. Part Desk Phone Compatible List--Connect via USB Cable,:T58W,T54W,T57W,T53,T44W,T34W,T43U,T46U,T48U,MP56/58/54; 3-Party Phone: GXP2170/2624; 8861; VVX350/401/411/450/600; J189. Connect via EHS62 / Telephone Cable Optional Accessories,: T27G,T29G,T4XG; 3-Party Phone: VVX311/310/400/410/250; 8851,7962,6945,7821,6871; 6867i; 9608,9621G,J139/179/189;