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. KEY FEATURES: 30Hz to 20k - Hz range with flat frequency response (actual response is microphone dependent) AES 256-bit encryption-enabled for applications where secure transmission is needed Proprietary Shure Gain Ranging optimizes the system’s dynamic range for any input source, eliminating the need for transmitter gain adjustments >120 d - B dynamic range 1, 10, and 20 m - W selectable RF output power (region dependent) 5 segment battery fuel gauge (For non-Shure branded batteries) Shure lithium-ion rechargeable battery pack provides over 12 hours of battery life, precision metering in hours and minutes, and zero memory effect External charging contacts for docked charging (with the SBC200 Dual Docking Charger) Up to 11 hours continuous use with 2 x AA batteries Backlit LCD with easy to navigate menu and controls 100 meter (300 ft.) operating range Rugged metal construction Frequency and power lockout TECHNICAL SPECS: Gain Offset Range 0 to 21 d - B (in 3 d - B steps) Battery Type Shure SB900 Rechargeable Li-Ion or AA batteries Battery Runtime@ 10 m - W Shure SB900: >12 hours - Alkaline: 11 hours Dimensions 256 mm x 51 mm (10.1 in. x 2.0 in.) L x Dia. Weight 340 g (12.0 oz.), without batteries Housing Machined aluminum Audio Input Configuration Unbalanced Maximum Input Level1 k - Hz at 1% THD 145 d - B SPL (SM58), typical - Note: Dependent on microphone type Preamplifier Equivalent Input Noise (EIN)System Gain Setting ≥ +20 120 d - BV, A-weighted, typical RF Output Antenna Type Integrated Single Band Helical Occupied Bandwidth <200 k - Hz Modulation Type Shure Proprietary Digital Power 1 m - W, 10 m - W, 20 m - W