We’ve seen several deals on these electric shoulder massagers, but this one is somewhat unique in that it’s battery powered, so you can use it outdoors, on a plane, or anywhere around your house where there isn’t a convenient power outlet nearby. We’ve posted a similar product from Naipo a few times before, but this one has twice as many shiatsu nodes (eight vs. four), so it’ll feel like you have a small army of masseuses tending to your knots.