Movall MP-317 Phoenix wings Tremolo Mini Pedal + 5 Way PDC Power Quality Cable It is a Tremolo that utilizes a photoelectric circuit which sounds just like one of the tremolos you would find in vintage tube amps. It is flexible yet easy to use. A simple three knob control allows for adjustment of Rate (Speed), Depth (how much the tremolo fluctuates) and Wave.The Wave knob is very cool because you can change it from a subtle triangle wave to a drastic square wave. This way you can achieve the classic tremolo sounds we all know and love as well as the more modern “stutter” sounds. It’s also possible to create amazing rhythmic pads, especially if combined with a cool delay sound.Features:Small, lightweight and exquisiteAluminum-alloy casingTrue bypass designPower: 9V DC adapter center negativeLED indicator shows the working state.Product Dimensions: 9.6*4.2*5CMWeight: 0.25kg Note: Power supply not included. Please use the 9V power adapter whose polarity is negative center otherwise, the product may not work properly. Package List: 1 * Effect Pedal1 * 5 Way PDC Power Chain 1 * User Manual(English & Chinese)1 * Year warranty through our store No Duty to Canada and USA FAST 'N FREE USA Shipping (typically about 4 days) Ships from Canada