Avaya 3645 IP Wireless Cordless Phone (700430416) Wireless VoIP phone, IEEE 802.11b/g/a (Wi-Fi), Large backlit display with icons, 8 hours talk time, 160 hours standby Push-to-talk functionality for workgroup communication, Rubberized grips for improved ergonomics and durability, Navigation and soft keys for simple access to frequently used operations, Office-quality speakerphone for hands-free operation 12 programmable line / feature keys, Dedicated softkey feature assignments for active calls include speaker, transfer, conference, hold, mute, and redial Management of telephones via DHCP and TFTP, WEP security, 40 bit and 128 bit and 802.11i (PSK) for secure communication Compatible with Avaya IP Office 4.1 and higher and Avaya Communications Manager, Requires Avaya Voice Priority Processor (AVPP) unit