The fastest way to add audio effects to a project, with a small footprint. We think this is the best sound board for props and costumes! The Sound Board has a lot of amazing features that make it the easiest thing ever: No Arduino or other microcontroller required! It is completely stand-alone, just needs a 3 to 5.5VDC battery, Small - only 1.5" x 0.9", and much more.