Matrix Auto-Chromatic Tuner
Pocket size tuner with quartz accuracy and easy-to-read LED display. Fully automatic and chromatic. Tuning range from C1-B6, automatically calibrates to any instrument. Includes built in microphone, automatic power off, and 1/4" input jack. Requires 2 AAA batteries (not included). Size 3.5" x 2" x 0.75".