[USB Charging Cable]Ultra-low power consumption and automatic shutdown function save energy and maximize battery life. Quickly charge using the included USB cable on your PC or power bank. The tuner automatically powers off after 3 minutes of no signal to save energy. [LED Color Display & Metronome]Open the color LED display of this guitar tuner clip, you can easily know whether the tone is too low or too high. You can position the screen any way you like. And this tuner can also act as a metronome, and you can easily jump to beat mode to listen to with just one click. [Precise Tuning]Using standard pitch, you can use this tuner to tune many instruments, such as guitar, bass, violin, banjo, ukulele, etc. You can tune any string, brass, or woodwind instrument. With a 360 swivel mechanism and the largest clamp opening, it fits almost any instrument. Material: plastic colour: black Package Contents: 1 x Tuner 1 x Micro-USB Cable 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.