Item Type: Guitar Tuner Material: ABS Battery Required for the Product: 1 x button cell CR2032 (excluded) Tuning Items: Twelve well tempered, guitar, bass, violin, ukulele. A4 Frequency: 440HZ Tuning Error: 0.5 cents Package List 1 x Guitar Tuner 1 x Instruction 1Quick Response: This tuner quickly senses the vibrational frequencies of music produced by different instruments, responding very quickly. 2Adjustable Angle: The 360 degree swivel clip design of this tuner allows you to adjust the desired angle for better and more convenient use. 3Accurate Tuning: The tuning of the tuner is precise and fast, and it can bring you the best music experience ever. 4ABS Housing: The ABS shell of the tuner is very light and wear resistant, which is convenient for you to carry out and use outdoors. 5Applicable Types: This tuner is designed for acoustic, chromatic and electric guitars, bass, ukulele, banjo, violin, and stringed instruments.