The Shure ULXD2 is a handheld wireless transmitter compatible with ULX-D digital wireless systems. With a rugged yet lightweight aluminum body and integrated antenna, the ULXD2 delivers transparent audio quality and rock-solid RF performance. Intuitive controls and menu screens combined with a high-contrast LCD make adjustments fast and easy, and IR sync rapidly relays setting changes to the receiver. Two AA alkaline batteries provide up to 11 hours of performance time, and advanced Shure lithium-ion rechargeability extends battery life and metering precision. For applications where secure transmission is required, ULX-D offers Advanced Encryption Standard (AES) 256-bit encrypted signal. Combined with a wide selection of compatible Shure microphone heads—including the legendary SM58—the ULXD2 delivers the sound quality and performance demanded in professional sound reinforcement.