The MT-40W features a metronome, chromatic tuner, and tone generator in a compact design. The large display shows all adjustable parameters, controlled via large buttons. Connect your electric instrument, acoustic pickup, or wind/brass instruments using the 1/4 inch (6.3mm) input jack, or use the built-in microphone. With its comprehensive functionality, the MT-40W offers reliable performance.Tuning range: A0 (27.5Hz) ~ C8 (4186Hz) Tuning modes: Chromatic, Tuning key: C, F Tuning precision: 1 Cent A4 range: 430 ~ 450Hz Detection methods: Mic, Line-in Display type: LCD, LED Tuning method: Auto Tone generator reference range: 2A ~ 6A Reference tone precision: 0.5 cent Metronome tempo range: 30 ~ 250 bpm Beat settings: 0 ~ 9 Rhythm: Electronic sound Metronome accuracy: 0.3% Power supply: 3V (2 x AAA batteries, not included) Color: Black Material: ABS + Electronics Dimensions: 105 x 18 x 65mm Package contents: 1 x Tuner 1 x Pickup Note: Other items shown are not included. Slight color variations may occur due to lighting and screen differences. Measurement error allowance: 13cm.