Planet Waves

This versatile chromatic tuner can be used to tune a number of instruments.
The Planet Waves Universal II Chromatic Tuner precisely tunes guitars, basses, and other stringed, woodwind and brass instruments.

Planet Waves PW-CT-09 Universal II Chromatic Tuner Features:

Built-in microphone for acoustic instruments and 1/4" input for electronic instruments
Dual-mode operation for Auto or Manual tuning
LCD and LED displays for tuning in both well-lit and dark environments
A440 calibrated. May be user-calibrated to any pitch from A435 to A445
Requires one CR2032 battery (included)