The Dry Martini by Tone City is based on the Fulltone OCD Overdrive. This is one of the most sought after boutique overdrive tones for thick rhythm and lead tones that are both as musical as they are smooth. This pedal can be used for rhythm or lead tones and also sounds great stacked with another pedal like the Bad Horse in front or after it.
There are three pots that control the Drive, Volume, and Tone as well as a "fat/thick" switch which instantly adds more or less body to the sound.
All Tone City pedals are True Bypass and require a 9v DC Center Minus Power Supply for operation as there's no battery slot.