Boss DS-2 Turbo Distortion Guitar Effects Pedal features distortion with twin TURBO modes. Boss DS-2 Turbo Distortion TURBO Mode I produces warm and mellow distortion with flat frequency response, whereas TURBO Mode II provides biting distortion with a mid-range boost that's great for leads. DS2 Turbo Distortion pedals come loaded with an inbuilt remote jack, which allows you to connect an external footswitch such as the FS-5L for instant, hands-free switching between modes.