Shure QLXD2/K8B Handheld Wireless Transmitter with KSM8 Dualdyne Microphone, G50 For this wireless system component to work, please make sure your transmitter and receiver match in frequency range (style) Includes QLXD2/K8B (black), 2 AA batteries, battery contact cover, microphone clip, and user guide With an interchangeable KSM8 microphone cartridge, the QLXD2/K8B Handheld Wireless Microphone Transmitter is ideal for wireless vocals in presentation spaces, music venues, and houses of worship 328 feet (100 m) operating range (line of sight) Offers up to 9 hours of continuous use with 2 AA alkaline batteries or up to 10 hours of continuous use with Shure lithium-ion rechargeable batteries (optional, not included)