Hand orientation: Left. System operates up to 300' (90m) operating range (line-of-sight). Rack mountable CR77 receiver with XLR and 1/4" outputs to integrate easily to your sound or AV system. Qe fitness headset microphone with bidirectional pickup pattern maximizes gain before feedback so your class can always hear your instructions clearly. Transmitter operates for up to eight hours of battery life using single AAA battery. AH7 Micro transmitter is mounted directly to the headset microphone, for a completely untethered performance (no beltpack or cables). Ideal for aerobics, yoga, spin, zumba, boot camp, boxing and kickboxing instructors. Wireless microphone system designed for fitness instructors and active performers.