Versatile: The tuner is designed for instruments including guitar (acoustic and electric), bass, violin, and ukulele. It also features a chromatic mode that allows for key changes, making it suitable for tuning any string, brass, or woodwind instrument. With its 360 swivel mechanism and large clip opening, it can be easily attached to almost any instrument. Fast, Accurate and Easy to Use: The tuner utilizes a highly sensitive Piezo Sensor that detects the instrument's vibration through direct contact, ensuring fast and accurate tuning without being affected by ambient noise. Its user-friendly interface makes it suitable for both beginners and professional musicians.turn it on, clip it on, and you're ready to tune. Bright High-Contrast Display: The tuner features a large color LCD display that provides clear visibility from any angle. It indicates if the instrument is flat (yellow), - (red), or perfectly tuned (green). The tuner can be positioned for optimal visibility. Automatic Power-Off and Memory Back-Up Functions: The tuner has an ultra-low-power design and automatic power-off function, which helps conserve battery life. Additionally, the memory back-up function retains all settings even after the tuner is powered off. Colour:black Material:plastic Package Contents: 2 x Color screen tuner Only 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.