MP58 VoIP Skype for Business (SfB) telephone, Android 9, 2 x Gigabit Ethernet, PoE required, AC optional, 7 inch touch colour LCD, optimal HD audio with Yealink Noise Proof Technology, supports Microsoft / Yealink / Unify Square device management platforms, RJ9 headset jack, 2 x USB, Bluetooth 4.2, 802.11ac Wi-Fi, add up to 3 expansion modules (sidecar / attendant console) SKU #EXP50, optional AC power supply, SKU #PS5V2000US, optional Bluetooth handset, SKU #BTH58. Special Order, No returns or cancellations.