From Truetone:

Bob Weil and Visual Sound first introduced the Jekyll & Hyde pedal to the world in 1997.  It was the first true dual effect pedal for guitar players, ever.  It was an immediate hit and the rest, as they say, is history.

Visual Sound is now TRUETONE, and the new V3 Series Jekyll & Hyde has been re-designed from scratch by Weil and RG Keen to meet the demands of today’s players.  With more flexibility, more great tones, and better construction than any of its predecessors, you’re going to love this new incarnation of a historically great pedal.

The distortion channel (a.k.a. "Hyde") is the same great distortion that Hyde was always known for, but with 2 major upgrades.  It now includes a Bass knob which interacts with Treble so you can shape your tone precisely.  There is also a new Voice switch which allows you to choose between classic open distortion or a more saturated tone.

The overdrive channel (a.k.a. "Jekyll") has changed completely, making it even more compatible with Hyde. Jekyll is now based on our old Open Road pedal, but with added Bass and Clean Mix knobs.

Specs:

• Each channel can be set to either True Bypass mode or buffered, via internal switches. The buffered mode utilizes our legendary Pure Tone circuit.
• Features the custom designed Forever Footswitch rated for 10 million hits. This interacts with relays having gold-plated contacts.
• Lifetime Warranty... even for second or third owners.
• Separate inputs and outputs so each side of the pedal can be used in a loop device, or midi switcher. Also possible to reverse the order of effects with a patch cable. Just like having 2 pedals, but in 1 housing.
• Small, pedal board friendly size, with front mounted jacks. Smaller footprint than 2 MXR or similar sized pedals.
• Comes in a black velvet bag inside the package box.