The Fishman Rechargeable 9V Battery Pack is a universal retro-fit battery replacement for all guitars with active pickup systems. It comes with a US charger and USB cable. Up to 200 hours of operation on a single charge. Can be mounted virtually anywhere. Also available with specifically designed replacement access plates for use in Strats and Les Pauls with active electronics. Simple to use. Avoid having to purchase batteries and carrying spares or worrying if you have spares. For acoustic/electrics or electric guitars and basses, this is the item you need. This is brand new and boxed with instructions and warranty.