The Intelli IMT-301 has all the features you need in one compact, easy-to-use unit. The convenient 5-in-1 design includes a digital metronome, chromatic instrument tuner, pitch generator, and thermo-hygro meter. Features include a built-in microphone for acoustic instruments or an output jack for electric instruments, auto-off function, fold-out metal stand, and vinyl carrying case. Dual-mode Metronome: The digital, dual-mode metronome features accented and subdivided beats, LCD simulated pendulum motion, LED beat lights, memory settings, and a tempo range of 30 to 250 bpm. Chromatic Instrument Tuner: The digital auto tuner features dual modes, either chromatic or guitar, A430 to A449 calibration, an LCD simulating a needle meter, an 8 octave range, and 88 chromatic tone generations. Reference Pitch Generator: The reference pitch generator features chromatic scale range of 88 pitches, pitch shift, and continuously adjustable volume control. Thermo-Hygrometer: The thermo-hygrometer has temperature range of negative 14 degrees Fahrenheit to 140 degrees Fahrenheit and a humidity range of 25 to 90 percent. Features: 5-in-1 Digital Metronome, Tuner, Pitch Generator, and Thermo-Hygro Meters. Large LCD screen simulates swinging of pendulum. Auto off function turns unit off after 3 minutes of no signal detection. 3 Color LED shows in tune or missed tune. LCD display & LED lights. Tempo Range 30-250 bpm. 5 rhythms & 3 tones (chime, drum, or wood block). 7 beat settings. Tuning Range A0-B7. Quadra flat tuning - flatting 4 steps. Pitch Shift Calibration 430-449Hz. +/-0.5 cent tuning accuracy. LCD meter indicates how closely tuned in cents scale. Adjustable knob for continuous volume control. Front thumb wheel for quick selection of tempo & notes. Input Jack. AC Adaptor Jack (AC adaptor not included). Built-in mic. Earphone Jack. Fold-out stand. Memory Function. Includes vinyl carrying case. 9 volt battery also included.