Featuring transparent 24-bit digital audio quality and incredibly efficient RF spectrum usage, the QLXD2 handheld transmitter is ideal for wireless vocals in presentation spaces, music venues, and houses of worship. Easy to use, the QLXD2 quickly syncs with a wireless receiver over IR at the push of a button and maintains clear, uninterrupted signal over its entire 100 m (330 ft.) range. All metal construction ensures durability, and a wide selection of compatible microphone choices offer legendary Shure sound signatures. The QLXD2 is compatible with all SM, Beta, and KSM microphone cartridges.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). 328 feet (100 M) operating range (line of sight). 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. Includes QLXD2/KSM9, 2 AA batteries, battery contact cover, microphone clip, and user guide. For this wireless system component to work, please make sure your transmitter and receiver match in frequency range (style).