Basically a cheap beginner pedal to add distortion and overdrive to your guitar signal.
It has four knobs:
The pedal has a volume knob, so by setting it up correctly, you can switch between clean and distorted signal without a difference in volume.
The drive slider works as a gain knob, but it gets really heavy real quick, so I used it pretty much only near the bottom.
The tone knob is pretty much like the tone knob on your guitar.
The distortion and overdrive can be mixed with the pedal, but I only pretty much used it in either completely distortion or overdrive mode, as I didn't like the mixed sound.
The distorted and overdriven sound are pretty okay. It's not near the sound of an expensive pedal, but the price is pretty much a steal. If you have a very cheap beginner amp, it's probably better than the distortion on that amp.
The pedal can be used with a 9V battery, or you can buy an adapter. It lasts pretty long on a charge, as long as you unplug the cables.
It's a good pedal for the money, especially for beginners, and it has both distortion and overdrive.