Aroma AMT-560 Electric Tuner & Metronome Built-in Mic with Pickup Cable 6.3mm for Guitar Chromatic Bass Violin Ukulele Universal Portable Worked as Tuner & Metronome good helper for novice. Super bright backlight LCD display(5.2 * 2.6cm) it can provide excellent visibility. Small and exquisite appearance it is convenient to carry. It can be used for tuning of guitar chromatic bass violin and ukulele. Powered by 2 * AAA batteries (NOT INCLUDED). Two ways to pick signal with built-in mic or pickup cable. Auto off function device will turn off automatically if there is no signal present or operation in 3mins. With a holder on back it is easy to stand on flat. Note: guitar showed on picture in not included. Specifications: Tempo : 30-260bpm Tempo precision: ±0.5% Beat: 0 1 2 3 4 5 6 7 8 9 Package weight: 113g / 3.99oz Product weight: 65g / 2.3oz : 2 * AAA batteries (not included) Display size: Approx.5.2 * 2.6cm / 2 * 1in : 430-450Hz Rhythm: 9 types Tuning mode: Mic Pickup cable Tuning mode: Chromatic guitar bass violin ukulele Package size: 13 * 8 * 2.2cm / 5.12 * 3.15 * 0.87in Package List: 1 * Electronic Tuner 1 * Pickup