Do you want to buy a set of professional but guitar turner? Our product can meet your requirement. materials, safe to use. Good friends. Various functions, tuning, metronome, tuner. , can be used for a long time. 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 made of strong and safe ABS materials, which can serve us for a long time. - We can easily carry this guitar tuner because of its compact design. The product is flexible for people to the turning mode. - Multi-function tuner, including beat, tuning and tuning functions. The product is portable for taking. - With large color screen, it is convenient to operate and save time and effort. The product is useful. - The product is cost-effective, you can buy this practical product at an . Package list: 1 x Tuner 1 x USB Cable 1 x Audio Cable 1 x Chinese and English Instruction Manual