· ¼” Wireless transmitter for guitars, keyboards, and other instruments. Skip the cables and connect to your amp, wire-free.· Stay wirelessly connected up to 30 feet. 2.4 GHz frequency offers a reliable wireless connection.· Get up to 4 hours of battery life. Keep the show going without having to plug in.· Designed for ultimate convenience. Device neatly stores inside the S1 Pro+ PA speaker to charge.· Pairs effortlessly with the wireless RF receiver integrated into the S1 Pro+ PA speaker. The perfect match for the most seamless experience.