Shure GLXD14R+/SM31 Dual Band Pro Digital Wireless Microphone System for Fitness, Aerobics - 12-Hour Battery Life, 100 ft Range | SM31FH Fitness Headset Mic, Single Channel Rack Mount Receiver

NEW, IMPROVED PERFORMANCE - GLX-D+ Dual Band Digital Wireless offers new features previously unavailable in the first generation of GLX-D Wireless: operation in both 2.4 and 5.8GHz, improved battery life, and multiple receiver options

EXCEPTIONAL, DIGITAL WIRELESS AUDIO - Always come through clear and captivate the audience with superior, transparent audio; GLX-D+ Dual Band intelligently avoids interference to give you total, reliable wireless freedom

NEW DUAL BAND WIRELESS TECHNOLOGY - provides reliable and consistent signal by automatically scanning both 2.4 and 5.8GHz bands and selecting the cleanest channel; More than double the bandwidth ensures that dropouts won't stop the show

EASY, WORRY-FREE SETUP & MANAGEMENT - Transmitters and receivers pair up automatically making setup as simple as possible; Smart frequency management continuously monitors the spectrum and moves to a clean channel in case any interference appears

SMART RECHARGEABILITY - Up to 12 hours of runtime. The new SB904 battery can be charged directly on the receiver or via included USB-C connector on the handheld microphone or bodypack; Quick charge allows for 1.5 hours of use from a 15 minutes of charge

RF PERFORMANCE FOR MULTIPLE SYSTEM INSTALLATIONS - GLX-D+ Dual Band provides improved RF performance, antenna distribution and automatic frequency management for up to 16 half-rack systems; Frequency Manager (GLXD+ FM) required (sold separately)

LICENSE-FREE FREQUENCY RANGE - allows you to travel without worrying about licenses, frequency coordination and other technical hurdles

Available in rack-mount, tabletop and guitar pedal receiver options with a wide selection of lavalier, headset and handheld microphone choices - including the legendary SM58; Compatible with GLX-D+FM Dual Band Frequency Manager