With 16 minutes of loop memory and without being overly complicated, the Boss RC-20XL is a great looper pedal for both practicing and live use. This one does not come with the manual, but you can download it off of Boss' website. The RC-20XL has a built-in quantize function, which time corrects your loops for easier overdubbing, which can be super handy in live situations! Cosmetically has some scuffing, but it does function 100% as it should. The RC-20XL can be powered by either a 9 volt power supply or 6 AA batteries.