Shure GLXD1 Bodypack Transmitter, Z2 Includes: (1) GLXD1 Wireless Bodypack Transmitter (SB902 Battery included) Automatically links to GLXD4 or GLXD6 receiver Operating Range: Indoors up to 100 feet (30m) typical, with a maximum of 200 feet (60m), Outdoors up to 65 feet (20m) typical, with a maximum of 165 feet (50m) under ideal conditions Continuous rechargeable use up to 16 hours Sophisticated design with rugged metal construction