Connectivity Medium: 60 x 60 x 85 cm; 907.18 g 132×64-pixel graphical LCD with back-light 1 Lithium Ion batteries PoE/GigE support Dual-port Gigabit Ethernet Power over Ethernet (IEEE 802.3af), class 2 1 x RJ9 (4P4C) handset port 1 x RJ9 (4P4C) headset port

Adjustable Volume and Intuitive Calls: HD voice: HD handset, HD speaker Smart Noise Filtering Wideband codec: Opus, G.722 Narrowband codec: G.711(A/μ), G.723.1,G.729AB, G.726, iLBC DTMF: In-band, Out-of-band (RFC 2833) and SIP INFO Full-duplex hands-free speakerphone with AEC

Portable Gadgets: 2 VoIP accounts Call hold, mute, DND One-touch speed dial, hotline Call forward, call waiting, call transfer Group listening, SMS, emergency call Redial, call return, auto answer Local 5-way conferencing Direct IP call without SIP proxy Ring tone selection/import/delete Set date time manually or automatically Dial plan XML Browser, action URL/URI

Audio: Colour: Classic Grey Wall mountable External Yealink AC adapter AC 100~240V input and DC 5V/600mA output Power consumption (PSU): 2-3W Power consumption (PoE): 3-4W Dimension (W*D*H*T): 188mm*189mm*162mm*50mm Operating humidity: 10~95% Operating temperature: -10~50°C (+14~122°F)