Hear every nuance of your call. Poly HD voice and Poly Acoustic Fence technologies give you business-grade audio quality with reduced background noise. Simplicity right out of the box. No need to guess if you are on mute, speakerphone, or headset [1]. These keys light up when selected. Instantly add co-workers to your call with 5-way local audio conferencing. Poly cloud management software makes these phones the smart choice. IT can easily monitor, manage, and maintain devices securely from the cloud with PDMS-SP and Poly Lens software. Call with confidenceSleek design meets quality audio at an affordable price. Easy-to-use illuminated keys, plug-and-play provisioning, and reliability make it pure value. Design Wall mountable Yes Mounting Desk/Wall Product colour Black Handset type Wired handset Product type IP Phone Phone features Number of VoIP accounts 16 Caller ID Yes Lines quantity 4 lines Display Touchscreen No Display diagonal 7.11 cm (2.8") Display LCD Audio Voice codecs G.711a