[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. This tuner can also act as a metronome, and you can easily switch to beat mode to listen to various rhythms with just one click. [Precise Tuning] Using standard pitch, this tuner can be used to tune many instruments, such as guitar, bass, violin, banjo, ukulele, etc. It is suitable for tuning string, brass, or woodwind instruments. Featuring a 360-degree swivel mechanism and wide clamp opening, it fits most instruments. Material: Plastic Color: Black Package Contents: 1 x Tuner 1 x Micro-USB Cable Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement may vary by +/- 1-3 cm.