The AirLine 77 Wind Instrument System offers a true wireless experience with no beltpacks and no cables, allowing complete freedom of mobility. The system includes an AH1 transmitter mounted to a Samson HM40 condenser element, along with the CR77 receiver. The AirLine Wind Instrument System features an AH1 transmitter mounted to a Samson HM40 condenser element used by many of today's top horn players. Both systems allow the performer to mount the element and transmitter to the bell of the instrument with no packs or wires to hinder their performance. All of the AirLine transmitters operate on inexpensive and lightweight AAA batteries that offer 14 hours of operation on a single battery. The core of the receiver system is the CR77 true-diversity half-rack UHF receiver. It works flawlessly with all AirLine UHF transmitters. Featuring a front panel display with large multi-segment audio level and RF level LED meters, and a large rotary volume knob that allows easy adjustment of audio output, the CR77 takes all of the guesswork out making your wireless system perform. Its synthesized PLL frequency control circuitry keeps the signal locked and true while dual tuned molded antennas with LEDs monitor the true-diversity operation. The rear panel features balanced XLR and unbalanced 1/4-inch outputs allowing flexible connection options. In addition, two CR77 receivers can be rackmounted together in a single space rack adapter available as an added accessory. With AirLine 77 Wind Instrument System, you get complete wireless freedom that's good to go anywhere the music takes you.