Features: Worked as Tuner & Metronome good helper for novice. Small and exquisite appearance it is convenient to carry. Two ways to pick up signal with built-in mic or pickup cable. Super bright backlight LCD display(5.2 * 2.6cm) it can provide excellent visibility. With a holder on back it is easy to stand on the flat. Powered by 2 * AAA batteries (NOT INCLUDED). Auto power off function the device will turn off automatically if there is no signal present or operation in 3mins. It can be used for the tuning of guitar chromatic bass violin and ukulele. Specifications: Tuning mode: Chromatic guitar bass violin ukulele : 430-450Hz Tempo : ±0.5% Tempo : 30-260bpm Beat: 0 1 2 3 4 5 6 7 8 9 Rhythm: 9 types Tuning mode: Mic Pickup cable Power: 2 * AAA batteries (not included) Display size: Approx.5.2 * 2.6cm / 2 * 1in Product weight: 65g / 2.3oz Package size: 19 * 13 * 1.8cm / 7.5 * 5.1 * 0.7in Package weight: 121g / 4.3oz Note: The guitar showed on the picture in not included. Package List: 1 * Electronic Tuner 1 * Pickup