Donner Looper Effects Pedals Unlimited Overdubs 10 Minutes of Looping Dirt simple looping - and nothing but looping. 10 minutes of looping Undo / Redo function. Unlimited overdubs 48Khz 24 bit uncompressed high quality audio Ultra-small footprintTrue bypass 1.Power Supply9V DC (Negative in the center). 2.Level KnobControl the sound volume with looper. 3.Input &amp; Output JackAnalogy though 1/4 mono audio jack. 4.LED LightLED indicator shows the working state. 5.Full metal shellAluminum-alloy classic, stable and strong. 6.True BypassTrue bypass for zero tone coloration. Input: 1/4Monaural Jack. Output: 1/4Monaural Jack. Working Current: 128mA. Dimensions: 92(D)*37(W)*32(H)mm. Net Weight: 200g.