D'Addario PW-CT-13 Micro Universal Tuner

Take a look at all the members of the NS Micro Family! The NS Micro Universal Tuner is the feature packed tuner designed to be seen at any angle. This headstock tuner features a reversible, multi-color display and visual metronome in a compact design. The dual-swivel clip-on mount allows limitless viewing angles and quick application and removal on any instrument, while the extendable arm provides clear unobstructed views of the screen.
D'Addario Planet Waves PW-CT-13 NS Micro Universal Tuner features:

Clip-on mount provides quick application and limitless viewing angles
Built-in piezo transducer picks up instrument’s vibration rather than sound
Tri-color reversible backlit LCD screen makes it easy to tune in dark environments
Wide calibration range (410Hz to 480Hz) and visual metronome
Tunes acoustic and electric guitars, basses, mandolins, banjos, ukulele, cellos, double basses, and other stringed instruments