Shure QLXD Wireless Bodypack Transmitter 470-534 MHzShure QLXD1 wireless body pack 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. Specific Configuration: QLXD1 wireless bodypack transmitter with (2) AA batteries, Black zippered pouch and user guide. Features: Works with QLX D Digital Wireless Systems G50 Frequency Range: 470 534 MHz Up to 330 feet of line of sight operating distance Up to 9 hours of