happy vibing: ) [SEP] I'm giving this product a 4 because, as others have mentioned, the battery back is a bit cheap.  Of the 4-6 or so Fukouku massage gloves I've owned (left and right, small and medium/large), the wiring has failed on at least one.  That being said, I buy them primarily for raves and music festival party favors, so they go through more wear and tear than they are likely designed for.<br />  The vibration output is impressive for the size of the finger tip vibrators, about 3/4 of a square inch each x5, but I wouldn't expect much therapeutic benefit.  This, in my opinion, is a novelty/sex toy, and for those purposes it works well... very well.<br />  The battery life is around a half hour to a lil over an hour depending on the setting hi/low.  Each glove requires 3 AAA batteries which install simply into a plastic pack, and fit into an elastic compartment inside the wrist of the glove.  The batter pack stay secure even through dancing and arm flailing for hours.  Also, I always bring an extra set of batteries or two per glove when I go anywhere with them.<br />  I hope this is helpful, happy vibing :).