The RockBoard Power LT XL is a rechargeable power station for effects pedals, independent from the wall outlet. No more worrying about your 9V batteries dying mid song. You can also forget about searching for a wall outlet on stage to power your pedal board. The RockBoard RBO Power LT XL is equipped with powerful and long-lasting, rechargeable lithium-ion batteries, to supply effects pedals up to approx. 50 hours or more with hum free 9V DC current. Recharge time for the unit is approximately 7 hours.