This is a 3-in-1 guitar tuner, made of ABS materials, with excellent functionality and . Its design has an color screen, which is convenient for us to tune the guitar. Reasonable design and good materials make it provide us with a . Features -Color: Black -Material: ABS. -Size: About 10.70X6.70X1.70cm/4.21X2.63X0.67in -Battery: 400mAH 3.7V -Range of sound correction: A0(27.5Hz) - C8(4186.0Hz) -Range of A4: 430-450Hz -Velocity: 30-250bpm - The product is great as friends or musicians who like guitar or other proper musical instruments. - The product is simple in design, but very practical in use, which brings great convenience to you. - Multi-function, the product is not only a professional tool, but also a professional tuner. - Made of materials fro durable long time use. Color display light, clear pattern, intuitive and convenient. - workmanship and materials ensure a and perfect details. Package list: 1 x Tuner 1 x USB Cable 1 x Audio Cable 1 x Chinese and English Instruction Manual