マジックワンド

I was worried it'd be bulky to hold, but the long handle actually makes it easy to reach my shoulders without straining. It's mains-powered so there's zero battery fade, and the deep rumble works out knots in my back better than anything I've tried.

The power on this thing is honestly no joke, and the cord means I never have to worry about it dying mid-session. The head is big enough that it doesn't feel pinpoint, more of a broad rumble. Thirty years of the same design clearly wasn't an accident.

I was worried the cord would make it awkward, but the reach is actually fine for using it on my shoulders while sitting at my desk. The power on this thing is no joke though, I barely need the low setting.