Yealink SIP-T57W IP Phone - Corded - Corded/Cordless - Wi-Fi Bluetooth - Wall Mountable Desktop - Classic Gray - VoIP - IEEE 802.11a/b/g/n/ac - Caller ID - Speakerphone - 2 x Network (RJ-45) - USB - PoE Ports - Color - SIP SIP v2 RTCP XR RTCP XR LDAP NAT STUN DHCP PPPoE SNTP UDP ... Protocol(s) Yealink Prime Business Phone with 7inch Multi-Point Touch Screen and Built-In Bluetooth 4.2. (power supply not included)