1、3 GEAR SELECTIONS: You can choose the mode currently using modulation effects, namely FLANGER mode, VIBRATO mode and PHASER mode 2、3 ADJUSTING KNOBS: The MIX knob adjusts the overall modulation effect and the ratio of the reverb effect to the dry sound, the DEPTH knob adjusts the depth of the modulation effect, and the DECAY knob adjusts the depth of the reverb effect 3、TAP BEAT FUNCTION: Tap the LED 2 or more times to synchronize the modulation rate to the desired beat, easy to operate 4、FREEZE FUNCTION: Press and hold the foot switch to activate the freeze effect. The parameters can be adjusted independently, with Tap Tempo function and self excitation function 5、EXCELLENT IMPEDANCE PERFORMANCE: Input impedance is 470k Ohms, output impedance is 100 Ohms, this effect pedal come with excellent performance 1 x Effects1 x Sticker1 x User Manual Item Type: Item Type: Modulation Reverb PedalMaterial: MetalColour: BlackWorking Mode: Modulation reverberation effect, parameters can be adjusted independently, with Tap Tempo function and self excitation functionInput: 1/4in Mono audio jack (470k Ohms impedance)Output: 1/4in Mono audio jack (100 Ohms impedance)Power Supply: 9V DC transformer (inside negative and outside positive), Micro Power is recommendedWorking Current: 160mA