Shure QLXD1 Wireless Bodypack Transmitter (G50 Band - 470-534 MHz)QLXD1 Wireless Bodypack Transmitter quickly syncs with a wireless receiver over IR at the push of a button and maintains a clear, uninterrupted signal over its entire range. Features: Works with QLX D Wireless Systems Offers up to 9 hours of continuous use with 2 AA alkaline batteries or up to 10 hours of continuous use with Shure lithium ion rechargeable batteries Includes QLXD1, 2 AA batteries, black zippered pouch, and user guide Over 120 dB of