Shure QLXD2/KSM9 Handheld Wireless Transmitter with KSM9 Microphone, H50 For this wireless system component to work, please make sure your transmitter and receiver match in frequency range (style) Includes QLXD2/KSM9, 2 AA batteries, battery contact cover, microphone clip, and user guide With an interchangeable KSM9 microphone cartridge, the QLXD2/KSM9 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 (included) or up to 10 hours of continuous use with a Shure SB900 lithium-ion rechargeable battery (not included) Works with QLX-D Digital Wireless Systems