Little bear BS1 Mammoth Wooly Bass fuzz fat guitar pedal Stomp Box effects It's for bass or guitar. and sound is very strong,and large distortion,Fuzz, and booster singal too. it's good for play Metal / Rock music . support DC in or Battery power. when you plug in DC power. it's auto to power by DC. pull out the DC. auto change to Battery FUN parts is the both BLUE LED. when Turn ON. the BOTH LED like the eyes of mammoth. it's very cool~~~ Using USPS post shipping to USA. usually 7-10 business days arrival,(not accept for other countrys buyer yet)