Samson’s AHX Headset System delivers frequency-agile UHF wireless freedom via the world’s smallest clip-on transmitter, packing high-definition sound, an internal rechargeable battery, and 300 feet of reliable performance into a device that fits in the palm of your hand. It also features a miniature condenser microphone and low-profile dual-ear headphones—ideal for singers and other active performers. AHX Headset System Frequency-agile UHF wireless system. 80 operating channels across a 24MHz bandwidth. Up to eight simultaneous systems per frequency band (region dependent). Includes AC adapter and rackmount kit. CR99 Wireless Receiver. Rugged, all-metal, rack-mountable chassis. Multi-function backlit LCD display (RF, audio, transmitter battery levels). Group scan for simple setup of single or multiple systems. IR sync wirelessly matches the receiver and transmitter frequency. True RF Diversity design minimizes dropouts. Tone key prevents unwanted noise when the transmitter is out of range. Removable 1/4 wave antennas. Balanced XLR and 1/4" outputs. ATX Wireless Transmitter. DE10 miniature condenser microphone capsule with omnidirectional pickup pattern. Up to eight hours of battery life with the built-in rechargeable Li-Ion battery. Gold-sealed contact charging connector for the included USB-style charger. Low battery LED indicator. 300' operating range (line of sight). Variable gain control. 1-touch mute. Frequency 863-865 Mhz.