TENS (Transcutaneous electrical nerve stimulation) massagers seem a bit like pseudoscience, but every time we post a deal on one of these things, we hear nothing but rave reviews. In fact, I use one occasionally after exercising, and it does seem to reduce muscle pain. At the very least, it feels cool.
Naipo has long made popular physical massage products, so an electrical alternative seems like a natural progression. Get it for $13 right now with promo code TSIAQZZZ.