The World's first and only sound activated LED leather guitar strap with adjustable computer sound module for variation of sequenced lights. The sound input module can be adjusted for the sound responding to a whisper or respond to the sounds of a large music concert. It reacts to all notes that is being played on your instrument. This product has a USB port to recharge the built in battery. The battery last for 4 to 5 hour on a single charge. Product includes a USB cable which has an indicator light that goes off when the strap is fully charged.