Wireless SoundStation® 2W Voice-Conferencing Telephone Twice as loud and provides twice the microphone sensitivity as the original SoundStation®. Three-microphone base unit with 2.4GHz WDCT digital spread spectrum radio. 150-ft. wireless range. Cell phone dialing via headset cable connection. Three-hour portable console charger. 64-bit encryption for added security. Manufacturer’s one-year warranty. EXPANDABLE MODEL: (Not shown.) Two external microphone ports enable future extension of two EX mics. Up to 24-hour talk time; 160-hour standby. EX Mic Pods (PCY220007840001), sold separately.