720p SIP Multi-unit Apartment Vandalproof Door Phone with RFID and PoE: IETF SIP, 2 SIP Lines, 802.3af POE, H.263/H.264, 720p@30fps, HD Voice, QoS, VPN, VLAN, SNMP, IPv6, TR069, AEC, Noise reduction, RFID, Door locks switch relay, IP65, IK10, -40~70 C.