The Shure BLX14R/MX53 Wireless Rack-mount Presenter System combines professional-quality sound with simple setup and up to 14 hours battery life for legendary audio performance right out of the box. The system includes BLX4R half-rack single-channel receiver, MX153 subminiature earset microphone with BLX1 bodypack transmitter, lavalier clip, power supply, 2 AA batteries, windscreens, rackmount kit, 2 1/4 wave antennas, zipper bag, and user guide. SUPERIOR AUDIO – Perform with Confidence Get the show going with no wires attached. Professional Shure sound for every band and any vocal need RELIABLE SIGNAL – Extend your range With a range of up to 300 feet (100m), you can take the show into the crowd without interruption. EASY SETUP – Own the stage BLX will have you up and running in record time with one-touch scan and selection BATTERY LIFE – 14 hours of power Because BLX transmitters get up to 14 hours of power from a single pair of AA batteries, the show can go on and on (and on) SYSTEMS EXPANSIONS – Run up to 12 channels per frequency band* You’ll probably need to find a bigger stage before you run out of channels.*Note: region and environment dependent. VERSATILITY INCLUDED – You’ve got options An impressive variety of Shure microphones are available in BLX systems, so you can find what works for you. In the Box BLX14 Rack Mountable Reciever MX153 Earset Microphone 1 53A8611 RACK MOUNT BRACKET 1 53A8612 LONG RACK MOUNT BRACKET 1 53B8443 LINK BRACKET 1 31B1856 Thread Adapter 2 95A8699 ANTENNA/BNC,1/4 WAVE 2 95A8994 ADAPTER,BULKHEAD,BNC 1 95B2313 BAG VINYL, ZIPPERED. 2 95K2035 CABLE,BNC,22 in. 1 Power supply