The product is very sensitive, with accurate tone detection, and can also be used in noisy environments.The product is designed with a 360 degree rotating clamp, allowing you to adjust the desired angle for easy viewing.The product is suitable for instruments such as Ukulele, guitar, bass, mandolin, etc. It is suitable for music teachers, , and beginners.The product has a tuner with high contrast and clear display screen, making it easy to observe the tuning effect.Material: plasticcolour: BlackPackage Contents:8 x Guitar TunerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.