SIP Compatible IP Audio Sub StationHands-free or Privacy Handset (White)Need this station with UL Certification? Be sure your model has a UL sticker or contact Aiphone for more details. FEATURES Handset and hands-free communication SIP 2.0 compliant 802.3af PoE, Class 0 8Ω, 2-watt audio output for secondary speaker connection 1 contact output and 1 trigger input Receive calls from door stations with door release Make outgoing calls to predetermined stations SPECSPower Source: PoE (IEEE 802.3af class 0)Power Draw: 4.32 WattsAudio Codec: G.711 (μ-law, A law), G.722Protocols: IPv4, IPv6, TCP, UDP, SIP, HTTP, HTTPS, RTSP, RTP, RTCP, IGMP, MLD, SMTP, FTP, DHCP, NTP, DNSPort Security: IEEE 802.1XOperating Temp: 32° - 104°F (0° - 40°C)Dimensions: 7-9⁄16" H x 3-9⁄16" W x 2-⅝" DMounting: Wall mounting bracket included.