FZone Digital Tuner

I leave this clipped on the headstock of my bass during gigs and can check the tuning in an instant.

I haven't had the battery problem another reviewer mentioned, and I use mine quite regularly when doing bench work. I originally bought it to ballpark tuning before hooking up to the big rig, but it turns out that this tuner is just as accurate as the one in my Line 6 processor. It's also quite useful on guitars with the electronics out or in pieces, as well as acoustics. Great price for a very useful product.

Mmmm... Design is not bad, it's simple and accurate but... This baby eats batteries!