Features:2 modes of operation: AUTO(time based filter), TOUCH(dynamically triggered).4 different Wah filter effect modes(LP--low pass, BP--bandpass, HP--high pass, SP--standard) and 1 Talk effect mode(vocals).RANGE knob: adjusts the tonality of the filter; SPEED/GAIN knob: Adjusts the rate of the 'AUTO' wah or the input response of the 'TOUCH' wah.Micro size and full metal shell, portable and durable.With true bypass footswitch and LED indicator light.Specifications:Material: MetalSignal Input: 1/4″Monaural Jack (impedance: 470k Ohms)Signal Output: 1/4″Monaural Jack (impedance: 100 Ohms)Power Supply: DC 9V adapter (center minus plug)(not included)Working Current: 120mAItem Size: Approx. 3.5 * 9 * 3cm / 1.4 * 3.5 * 1.2inItem Weight: Approx. 150g / 5.3ozPackage Size: 10.5 * 6 * 4.5cm / 4.1 * 2.4 * 1.8inPackage Weight: 175g / 6.2ozNote:The power adapter is not included.Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.Package List:1 * Effect Pedal1 * User Manual(English & Chinese)