The Callbox IP270G is designed for the busy office. Featuring a 3.7” ” TFT-LCD Backlight Display with 8 Line keys and a total of 21 programmable feature keys . It supports up to 4-way conference. IP270G is optimized for general office use. The 21programmable feature keys could be configured as Busy Lamp Field, Speed Dials, IP PBX features like BLF, SCA, Intercom, Call Pickup, Call Park and many other features. HD Voice bring you the lifelike hearing experience.