The MT-40 is a great 3-in-1 metronome/tuner/tone generator designed for guitar, ba, violin and ukulele. The multi-functional tuner will take you performance to a higher level.Features: 3 function in 1 portable device: Tuner, Metronome and Tone Generator. Clear LCD screen give you excellent visual effect. Tuning modes: G(guitar), B(ba), V(violin), U(ukelele) and C(chromatic), with high tuning precision, 430~450Hz. Multi-functional metronome, with 30-250 beat per minute tempo, 0~9 beat and various rhythm patterns. Clip-on pickup & built-in microphone for tuning accurately and easily. The accurate tuner with earphone jack, input jack and volume control and indicator light. Mini size with fashionable appearance, with folded stand in the back for convenient usage. Auto power off function, it will turn off automatically in 5mins if there is no signal or operation. Powered by 2 * AAA battery(not included).Specifications: Tuning Scale: Chromatic/Guitar/Ba/Violin/Ukulele Tuning Range: A0(27.5Hz)~C8(4186Hz) Tuning Precision: 1 Cent A4 Range: 430~450Hz Detection Method: Mic, Line-in Display Mode: LCD Display Tempo Range: 30~250 Bpm Beat: 0~9 Power Supply: 3V(2 * AAA) Batteries(Not included) Item Size: 10.5 * 1.8 * 6.5cm / 4.1 * 0.7 * 2.6in Item Weight: 68g / 2.4oz Package Size: 11 * 7.5 * 4cm / 4.3 * 3.0 * 1.6in Package Weight: 112g / 4.0ozPackage List: 1 * Tuner 1 * User Manual(English / Chinese)Note: The instruments and the battery are not included. Please remove the battery if the product will not used for a long period.