The OG Darkglass bass overdrive pedal. One of the first batch of B3Ks hand built in the USA by Spencer Doren of 3Leaf Audio from around 2012 (and the first ones to have the relay bypass).

Owned from new, in excellent condition. Light use in a smoke free home. Clean Velco on the rear. Comes in original box. Requires a 9v power adapter (not included).