Samson's AirLine ATX Series offers frequency-agile UHF wireless freedom via the world's smallest clip-on transmitter, which places high definition sound, an internal rechargeable battery, and 300 feet of reliable performance in a device that fits in the palm of your hand. Available in four configurations (Headset, Fitness Headset, Lavalier, Wind Instrument) to ensure your specific microphone needs are met. The AirLine ATX Series continues Samson's longstanding commitment to wireless innovation with the world's smallest clip-on transmitter. The ATX Wireless Micro Transmitter clips directly to your belt, waistband or instrument bell, allowing you to rule the stage with confidence and without cables. It provides infrared sync to wirelessly match the receiver and transmitter frequency, easily accessible Gain and Mute controls, a battery life LED indicator and an 8-hour rechargeable lithium-ion battery. Offering frequency-agile operation, the AirLine ATX Series' rack mountable CR99 Wireless Receiver provides 80 selectable channels for reliable performance no matter where you are. The receiver's True RF Diversity design minimizes dropouts, while tone key technology prevents unwanted noise when your transmitter is off or out of range.