Guitar tremolo pedal effect. The Hummingbird is a choppy, sawtooth tremolo modeled on the vintage ''repeat percussion'' unit and similar to those found in old Valco and Vox amplifiers. It is capable of producing everything from classic 50's style shimmering tremolo to a synthy, delay-like chop that turns your signal into a burst of short pings and on through to near ring modulation speeds. Simply choosing between modes 1 (slow), 2 (mid-tempo) or 3 (fast) and adjusting the rate and depth controls will unlock a whole new world of amplitude modulation at your feet. 9 V DC adapter is not included. Dimensions: 5,6 x 6,6 x 12,2 cm. Weight: 264 g.