Hear every nuance with pro-grade audio plus Poly HD voice and Poly Acoustic Clarity technologies. Reduce distracting background noise with Poly Acoustic Fence technology. With a simple, intuitive interface; ergonomic design; and large user touchscreen you get one-touch access to your contacts and meetings. Dial up your productivityGet to work fast with the 7-in color multi-touch LCD display. And with the simple and intuitive interface, Bluetooth® connectivity, integrated Wi-Fi, and Poly quality audio youre ready in a snap. Design Product colour Black Handset type Wired handset Product type IP Phone Phone features Caller ID Yes Lines quantity 24 lines Display Touchscreen Yes Aspect ratio 16:9 Display resolution 1024 x 600 pixels Display diagonal 17.8 cm (7") Display LCD Audio Voice codecs G.722, G.729ab, G.711alaw, iLBC, G.711ulaw, OPUS Speakerphone Yes Network Security algorithms EAP-TLS, MSCHAPv2, PEAP, SRTP, WEP, WPA, WPA2, WPA2-Enterprise Bluetooth version 4.2 Bluetooth Yes Wi-Fi s