Clean booster with 3-band EQ. The Engager Boost clean boost pedal is useful when you want to add a little extra flavor to your sound, increase the volume, or add thickness to your tone. The onboard 3-band EQ lets you easily mix your tone, and the Frequency switch lets you select a mid-range for precise tone shaping. In addition, Engager Boost can boost the signal to the tube amp's preamp, making it ideal for thickening your tone. It has True mode and Buffered Bypass mode, making it suitable for a variety of situations. Onboard 3-band EQ, true/buffered bypass LED-backlit knobs, Fender Amp Jewel LED - Magnetic battery door - Lightweight yet highly durable machined aluminum housingInput Impedance 500k ohms Output Impedance 10k ohms Power Consumption 50mA Power Requirements 9-Volt Battery or 9VDC Center Negative AC Adapter (not included)