The QLXD2/KSM9 handheld wireless microphone transmitter works with QLX-D digital wireless systems. With an interchangeable BETA87A microphone cartridge. 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 100m (330ft) range. All metal construction ensures durability, and a wide selection of compatible microphone choices offer legendary Shure sound signatures.