BEHRINGER ULTRA TREMOLO/PAN TP300 Get the classic and mind-bending tremolo effects of the 60s and take off with dimensional auto-pan effects This BEHRINGER product has been designed to compete head to head with leading products on the market Dedicated Depth, Rate and Mode controls for awesome sound shaping Status LED for effect on/off and battery check Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included)