The Wireless Tender Option is a perfect complement to our 2-Diver and 3-Diver communicators. Amron's Full Duplex (Simulcom®) Wireless Tender is designed for the top-side tender to communicate to divers with hands-free operation and no required buttons to push. This wireless unit allows mobility for the tender while checking equipment and still maintaining constant contact with the divers (4 wire mode only). The Wireless Tender Option includes: (1) 2829-11 wireless headset and transceiver. Additional 2829-11 Wireless Headset and Transceiver Kits can be purchased for use with the Wireless Tender Option as "listen only" devices, as only one headset on the system can listen and talk priority to the divers. The design allows the capability to add an unlimited number of remote listen only headsets for the topside personnel. The units operate on 2.4 GHz up to a range of 120 yards (110 meters). The transmitter/receiver unit is housed in a rugged plastic casing that can be clipped to a belt or slipped into a pocket. A single charge of the NiCad battery from the included AC adapter is capable of operating (transmitting and receiving) continually for up to 5 hours. In standby mode, battery will last for up to 8 hours. The standard headset is a tough over-the-ear single ear muff design with adjustable boom microphone. Also included is a smaller, lightweight headset/microphone for added mobility.