JMS Tuner Pedal Chromatic Small Footprint Tiny True Bypass Super small - 94mm long, 38mm wide, 38mm tall (3.7"x1.5"x1.5") True Bypass Tonal Range 12Hz~4186HZ (C8) Only weighs 9oz with the box Works with 7 string guitars too, as well as 4 or 5 string basses.