Aroma Tuner- Guitar Tuner for Acoustic, Bass, 6 & 12 string Guitars, Banjo, Mandolin, Ukulele, Violin, Cello, Trumpet, Brass, Sax, Flute, Woodwinds (black AT-300B-) High Precise Detection and sensitive vibration clip. With stay put clip, display rotates 360 degrees for easy viewing. Guitar bass ukulele and violin. Designed for beginners and professionals. 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.