Perfect design 4 tuning modes to choose from (chromatic, guitar, violin, ukulele). The adjustment range is from A0 (27.5Hz) - C8 (4186.01Hz), the default tone is 440 Hz, but you can adjust it from 430 to 450 Hz according to your needs Exact adjustment Easy to use Advanced microprocessor, high-precision piezoelectric sensor and sensitive vibration clip, ensure precise adjustment. Small size guitar tuner with buttons to control, easy to use 360 degree flexibility color screen High contrast color screen with strong and flexible clip for the attribution angle. The 360 degree rotatable screen, flexible rotation to simplify the adjustment and get the desired angle, making it easier to read Built-in lithium battery Ultra-low consumption and automatic power off function to save energy and extend battery life. Allows more than 10 hours of continuous use per charge Wide applicability Thanks to its design, the tuner has strong tuning ability and is suitable for different instruments. Such as guitar, bass, ukulele, violin, etc ColorBlack Delivery quantity 1 piece Effective practice tool: Master rhythm skills and improve your sense of tempo and rhythm by practicing with our mechanical metronome.