The WST-523 Clip Tuner is designed for Guitar, Bass, Wind Instruments, Violin, and Ukulele.
It has two tuning modes: MIC and Clip.
The large LCD has three colors to tell you the status of your note:
Red = sharp
Orange = flat
Green = the note is in tune.
Clip on to the head-stock or use the internal Mic to quickly tune your Guitar or Bass