The EXP40 Expansion Module for the SIP-T46GN, expanding the functional capability of your sip phone to a whole new level. It features a large graphic LCD. Two pages of 20 flexible buttons are shown on the display can be programmed up to 40 various features, the productivity-enhancing features include BLF/BLA, speed dialing, call forward, transfer, park, pickup, etc. New design pursuing tiniest details for matching elegantly with the look and feel of T46GN, rubber covers on the feet that contact the desk surface help prevent the phone from sliding, The new foot stand allows two positions for the device, support application of wall mountable, the backlit display eliminates the need for external light. Equipped with a 160x320 graphic LCD with Backlight. 20 physical keys each with a dual colour LED and two page views are possible, this allows 40 additional programmable keys that can be used for speed dialing, BLF/BLA, call forward, transfer, park, pickup, etc. 2 independent control keys are used for fast switch pages. Supports up to 6 Expansion Modules for an attendant console application, adding up to 240 additional buttons. it has to be powered by a conventional power supply (5V/1.2A) if exceed 3 connections.