Polycom Wireless SoundStation 2W EX (Expandable, With Display) -- $639
Polycom wireless conference phone, Security of voice encryption, 24 Hours of talk time, Ability to expand by adding two wired microphones (sold separately), Provides ability to dial through a cell phone, Delivers voice quality that is twice as loud and provides twice the microphone sensitivity as the original SoundStation, Full duplex, 2.4GHz/1.9GHz platforms provide simple and robust wireless capability with any analog phone line, 150ft. wireless roaming from the base station, Wireless frequency hopping to avoid interference, Long lasting Lithium-ion battery, Standard headset cable (2.5mm connection) provided enables users to instantly connect their cell phone to the conference phone (gives users the option to dial directly through a cell phone or transfer between handset and conference phone mode during a conversation), Digital spread spectrum frequency hopping, Signal range 150ft from base station, Dual diversity antennas, Up to 160 hour standby time, 8 Hour charge time, Signal strength and battery status continuously displayed on LCD, Portable console charger, High resolution backlit graphical LCD, Caller ID, 25 Phone book, Keys: on-hook/off-hook, conference, mute, volume up/down, menu, navigation, 3 Context sensitive soft keys including redial, hold, programmable conference key, 3 Console cardioid microphones, Up to 10ft. microphone pick-up range, Dynamic noise reduction, Mini-USB port for software upgrades, Wall mountable, Power LED, Call in progress LE, Unit does not have to be plugged into an AC outlet, it uses a battery instead, The transmitter has to be plugged into the analog phone line and it will communicate with the star-fish unit on the desk up to 150 feet away.