The world’s first Sound Activated LED Leather Guitar/Bass Strap with adjustable computer sound module for variation of sequence lights. The sound input module can be adjusted for the sound of a whisper or the sounds of large concert music. The LED lights react to all notes that is being played on your instrument. The strap has a USB port to recharge the built in battery with charging cord included as well as an indicator light to notify you when the charge is full. The battery lasts for 4 to 5 hour on a single charge. The leather guitar strap is also adjustable. 1 Lithium ion batteries required. (included)