Obihai Gigabit IP Phone with Power Supply - Up to 24 Lines - Built-In WiFi and Bluetooth - Works with Google Voice and SIP-Based Services - 24 x Total Line - VoIP - IEEE 802.11n - Caller ID - Speakerphone - 2 x Network (RJ-45) - USB - PoE Ports - Color - SIP, RTP, RTCP, DHCP, SDP, ICMP, SNTP, SRTP, LLDP-PoE, PPPoE Protocol(s) - AC Adapter