Snark Clip-On SN-1 Chromatic Tuner
This cute tuner with the irreverent name functions well on acoustic, electric and bass guitars, and on ukuleles.
It can be clipped anywhere on the instrument's headstock - there are no dead spots. The full-color display can be rotated 360 degrees, so it works well for lefties and righties.
It features an LCD readout, a strong instrument clamp, pitch calibration buttons, and a visual metronome activated by a Tap button. It comes calibrated at A-440, but can be set anywhere from A-415 to A-466. A lithium CR-2032 battery is included.