Get the classic, warm, mind-boggling tremolo effects of vintage 60s amps. This BEHRINGER product has been designed to compete head to head with leading products on the market. * There are dedicated Rate, Wave and Depth controls for first-class sound shaping. Behringer included a status LED for effect On/Off and battery check, and you can run your UT300 on a 9 V battery or a DC power supply (not included). For absolutely noise-free operation, a first-class electronic On/Off switch is integrated.