The MT-40W is a compact package that includes a metronome, chromatic tuner, and tone generator in one. The LARGE display gives you all the parameters you can adjust using the control buttons. Connect your electric instrument, a pickup for your acoustic, brass, or woodwind instruments to the 1/4-inch (6.3 mm) input or use the built-in microphone. With all these essential features, the MT-40W is hard to beat! Tuning Range: A0 (27.5Hz) ~ C8 (4186Hz) Tuning Mode: Chromatic Tuning Key: C, F, Tuning Accuracy: 1 Cent A4 Range: 430~450Hz Detection: Microphone, Line-in Display Mode: LCD Display, LED Display Tuning: Auto Tone Generator Reference Tone Range: 2A~6A Reference Tone Accuracy: 0.5 Cent Metronome Tempo Range: 30~250 BPM Beat: 0~9 Rhythm: Tempo Accuracy: 0.3% Metronome Sound: Electronic Sound Power Supply: 3V (2xAAA Batteries) (Not Included) Color: Black Material: ABS + Electronics Size: 105 x 18 x 65mm Packaging Contents: 1 * Tuner 1 * Pickup Only the Above Packaging Contents, Other Products Are Not Included Note: Lighting and different screens may cause the color of the product to look slightly different in the image than in reality. The allowed size tolerance is +/- 1-3 cm.