Shure ULXD2/SM58 Handheld Transmitter with SM58 Vocal Mic Capsule - for use with ULX-D Digital Wireless Microphone Systems, Receiver Sold Separately | V50 Band (ULXD2/SM58=-V50)This transmitter requires a Ulxd4 receiver to complete the system. Note: when purchasing separate wireless components, please match their frequency bands to ensure proper system operationThe Ulxd2 is a handheld wireless transmitter compatible with ULX-D digital wireless SystemsInterchangeable Shure microphone cartridge. This transmitter model includes the SM58 microphone cartridgeWith a rugged yet lightweight aluminum body and integrated antenna, The Ulxd2 delivers uncompromising audio quality and RF performance, AES 256-bit encryption for secure transmission, and advanced recharge ability options for professional sound Reinforcement applications30 hz–20 kHz range with flat frequency response (actual response is microphone dependent)