one thing i like about the ZOOM CDR+, aside from all the effects, is that it can be powered via usb. It uses 9 volt and 500 ma, many power bricks do 100-300 ma. some have a couple slots for 500ma. But DC 5 volts from a phone, phone charger, or back up brick works just fine. the little red usb power brick (pictured) runs it for 3+ hours, no problem. i can also run it from my flashlight.. pretty handy for open mics and short sets if you dont want to lug a lot of gear. Zoom MS-70CDR+ is a significantly upgraded version of the original MS-70CDR, (i have both) featuring a larger effects library with 149 algorithms compared to the original's 86 effects.