Up to 12 hours of use with rechargeable battery. 330 ft (100 m) operating range. TA4M and LEMO3 versions available. The ULXD1 is a wireless bodypack transmitter compatible with ULX-D Digital Wireless Systems. With a rugged yet lightweight aluminum case, the ULXD1 delivers uncompromising audio quality and RF performance, AES 256-bit encryption for secure transmission and advanced rechargeability options for professional sound reinforcement applications.