Featuring transparent 24-bit digital audio quality and incredibly efficient RF spectrum usage, the QLXD1 Wireless Bodypack Transmitter is ideal for wireless vocals and instruments in mid-size presentation spaces, music venues, and houses of worship. Features Over 120 dB of dynamic range: no transmitter gain adjustments needed AES 256-bit encryption for secure transmission Optional Shure SB900 lithium ion rechargeable battery reports remaining runtime in hours and minutes External charging contacts for docked charging Backlit LCD with easy to navigate menu and controls Selectable display mode showing group/channel, frequency, or battery runtime 4-Pin male mini connector (TA4M) Rugged metal construction Detachable ¼ wave antenna Frequency and power lockout Radio Frequency Range 20 Hz–20 kHz Rechargeable components? Yes Battery Requirements 2 AA alkaline batteries or SB900 Lithium-Ion Rechargeable Battery Battery Life Shure SB900: Up to 10 hours, Alkaline: Up to 9 hours Typical Operating Distance 100 m (330 ft) line of sight