High Precise Detection and sensitive vibration clip,no background noise,good for loud,chaotic environment. | With stay put clip, display rotates 360 degrees for easy viewing. | "Material: ABS plastic, it can be used for the tuning of guitar, chromatic, bass, violin, viola and ukulele. " | "Auto power off function, the device will turn off automatically if there is no signal present or operation in 3mins. " | Guitar bass and violin. Designed for beginners and professionals. Suitable for campus bands and Music Studios