AirLine 88x Fitness is a UHF wireless headset system combining the AH8 integrated headset microphone/transmitter with the CR88x 100-channel true-diversity receiver. It offers 100 operating channels across a 25 MHz bandwidth, a 300 ft (100 m) line-of-sight range, and an audio response of 50 Hz–15 kHz. Features include infrared synchronization, one-touch channel scanning, and auto-mute with dropouts. Outputs are balanced XLR and unbalanced 1/4" for connection to amplifiers.