iSave Authorized seller of Polycom The Polycom 2200-46350-025 is an expansion module for telephone attendants, receptionists, administrative assistants, secretaries, and other power users who manage multiple simultaneous telephone calls on a daily basis. The VVX Expansion Module is a plug-and- play device that requires no set-up as power and signaling are provided by the host VVX business media phone. No extra cables or power supplies are required to operate the Expansion Module. 2200-46350-025 Features Color Expansion Module 28 Multifunctional Line Keys As Line Registration, Call Appearance, Speed Dial 4.3 LCD Exapandable Up To 3 VVX Modules w/ A Host Plug- Play Operating Temperature 0 To 40 C Call Transfer Busy Lamp Field Speed Dial Fully programmable Elegant Look Easy Transition Better Call Visualization Experience Delivers Ultimate Communications Experience