Thank you for viewing. This is a WAY HUGE GREEN RHINO OVERDRIVE MKII. I purchased it used and used it several times in band practice. I really liked the sound, but I am selling it to purchase other equipment. The 100Hz knob allows you to boost the bass significantly, which is great when you want to introduce a TS-style tone while maintaining the low end. The enclosure is also large, and the switch feels very reliable. It comes with the box and instruction manual from when I purchased it used. Thank you. (The following is automatically generated text) Overdrive pedal that achieves a variety of tones. - Model Name: GREEN RHINO OVERDRIVE MKII - Brand: WAY HUGE - Power: 9V DC - Controls: Volume, Drive, Tone - Input/Output Terminals: IN, OUT - Features: 100Hz frequency setting