A high gain distortion pedal from Caline with a mini EQ which lets you tweak the Bass, Mids, and Treble. The two-way switch sounds a little smoother on Vintage and defined on Modern. This combined with volume and gain controls lets you experiment with a range of usable heavy distortion tones. This pedal to our ears may be influenced by the Wampler Triple Wreck. The Red Devil is very durably built with a true bypass footswitch. Takes a 9v battery or 9v DC center negative power supply. Features: GAIN / VOLUME controls for awesome sound shaping, lets you tweak the Bass, Mids, and Treble, tweaking these allows you to design your guitar sounds for different performances. Double distortion: Vintage and Modern. Rich timbre and great dynamic range effect, adapt both classic rock and modern heavy metal, great tone, easy and perfect operation1. True bypass design. 2. The CP-30 is geared to heavy metal tone, low frequency descend degree is good. 3. 2 modes: Vintage Style and Modern Style.Tube amp tones. Note: Power supply not included. Please use the 9V DC power adapter whose polarity is negative center otherwise, the product may not work properly.