Shure GLXD14R+ Dual Band Pro Digital Wireless System for Guitar and Bass - 12-Hour Battery Life, 100 ft Range | Includes 1/4" Jack Instrument Cable & Single Channel Rack Mount Receiver (GLXD14R+-Z3)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.