The JOYO JMT-9001B offers supremely accurate tuning that is perfect for chromatic， guitar， bass， violin and ukulele. It comes with built-in MIC to detect sound signal， so you can tune your musical instruments by MIC or using the pickup. It is also an advanced metronome， allowing you to practice perfect timing at any tempo with various different rhythms. Specifications: Function: JOYO JMT-9001B 3 In 1 with LCD Backlight Motro-Tuner Feature: - The 3-in-1 JMT-9001B digital metro-tuner is new designed for chromatic， guitar， bass， violin and ukulele. - Built-in MIC to detect sound signal， you can tune your musical instruments by MIC or using the pickup. - LCD screen with backlight to display the note name and pitch， can recommend to turn on the back light at dark circumstances. - Packaged with a pickup， can clip the pickup onto your instrument when you are tuning under noisy surroundings. - With three LED lights to indicate the tuning pitch or beats. - With a fordable steel stand in the back， easy to use. - It will automatically turn off after 3 minutes if no operation is on to save power. Metronome: - Beat: 0， 1， 2， 3， 4， 5， 6， 7， 8， 9 - Tempo: 30 - 260bpm Tuner: - A4 Frequency: 410 ~ 450Hz - Semi-tone Flat: b， bb - Tolerance: + / - 1cent - Tuning Range: C1(32.70Hz) ~ C8(4186.01Hz) - Tone Generator: 4C - 4B - Tuning Items: c-Chromatic， g-Guitar， b-Bass， v-Violin， u-Ukulele Tuning Pitch Indicator Lights: - Flat: Left red light on， LCD needle towards left side. - Shape: Right red light on， LCD needle towards right side. - In Tune: Green light in the center on. Power Source: 2 x AAA Batteries (Not included) Color: Black Product Weight: 55g Package Weight: 110g Product Dimensions (L x W x H): 101 x 62 x 15mm Package Dimensions (L x W x H): 150 x 145 x 32mm Approved: CE / FCC After Sales Service: 1 Year Warranty Accessories: 1 x User Manual 1 x Pickup