The Series 9900 wireless intercom system is the perfect solution for wireless communications in demanding, high-noise environments such as airline and airport operations, fire and rescue applications, marine intercom, or any applications requiring robust, reliable and secure communications. The 9900 system is ideal for push-back operations, wing-walkers, marshaling agents, maintenance mechanics and de-icing operations. The 9900 wireless system consists of the push-back gateway, wireless belt stations, and any Series 9900 wireless headsets.The U9910-BSW is a voice-active, belt station that provides the wireless interface between the headset and a wireless gateway. Up to four belt stations can be linked to the a gateway via close-proximity linking. The status of the wireless link, radio/intercom PTT transmit, and battery charge is indicted by the bi-color LED which is located on the on/off/link button. A user replaceable, rechargeable Li-Polymer battery provides 24 hours of continual use.