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The Shure QLXD2/B87A is a digital handheld wireless microphone transmitter compatible with QLX-D and ULX-D receivers. It comes equipped with the Beta 87A supercardioid condenser capsule designed to withstand extreme sound pressure levels while still delivering a remarkably smooth frequency response for vocal performers and presenters. The capsule features a supercardioid polar pattern that offers excellent rejection of off-axis background noise helping to reduce feedback. The QLXD2/B87A operates on a 64 MHz UHF tuning range with 2560 selectable frequencies available. It provides up to 9 hours of operation on two AA batteries with a transmission range up to 330′ and a selectable 1/10mW RF power output. With a rugged yet lightweight aluminum housing the QLXD2/B87A transmitter delivers pristine audio quality and RF performance as well as AES 256-bit encryption for secure transmission and advanced rechargeability options. It is well suited for sound reinforcement applications in medium-sized venues and houses of worship as well as A/V installations in conference educational and corporate facilities.