The AirLine XDm is a 2.4 GHz digital headset wireless system built around an AHD micro transmitter mounted on a Samson Qe headset and the RXD1M tabletop receiver. It supports one-touch pairing, up to 100 ft line-of-sight range, and up to six hours of battery life from its built-in rechargeable lithium-ion cell. The RXD1M provides balanced XLR and unbalanced 1/4\" and 1/8\" outputs, with adjustable gain; the transmitter is water and sweat resistant.