Aroma AT-200D Clip On Chromatic Acoustic Guitar Tuner/Guitar,Bass,Ukulele-Black Color
 
This tuner has three (3) colors: 
Yellow: when your tuned flat
Green: when in tune
Red: to notify your tuned to high
 
Features:
Model: Aroma AT-200D mini Tuning
Items: Chromatic, Guitar, Bass, Ukulele
Tuning tolerance: +-0.5 cent T
uning method: Clip tuning
Pitch range: 440 Hz
Color option: black, rubberized rose red
Weight: 23g
Dimension: 50 x 41 x 27mm
Power: by CR2032 cell battery
 
Chromatic Mini Clip Digital Guitar Tuner Guitar/Bass/Ukulele/ Aroma AT-200D