Whether you’re pushing your cranked amp into full-blown
  distortion or just adding some warmth, grit and character to your
  clean sound, the Hammertone™ Overdrive is an essential addition
  to your rig. This compact drive packs a big punch – the pre-gain
  mid boost adds the perfect edge for cutting through the mix,
  while the pedal board-friendly top-mounted in & out jacks and
  true bypass footswitch mean it will integrate seamlessly into
  your rig.
  - Unique Fender®-Designed Analog Overdrive Circuit
  
 
  - Pre-Gain Mid Boost
  
 
  - Top Mount Input/Output Jacks
  
 
  - True-Bypass Switching
  
 
  - Powered by 9-Volt Battery or Center Negative AC Adaptor, Not
  Included