This is one of the loudest digital metronomes, includes a very loud pitch pipes, tuner. Includes a thermometer and hygrometer to monitor the playing conditions. A thumb wheel on the front allows quick selection of tempo and notes. Metronome Features: Tempo Range - 30 to 250 beats per minute. 5 subdivisions of beats- eighth notes, triplets, sixteenth, triplet and sixteenths with middle rests. When accented beat is set - the light flashes red for the first beat and green on the other beats. Volume control is continuously adjustable by a knob. Accented beats 0,2,3,4,5,6,7 with 3 different tones for the strong beat - a chime / weak beat - a drum / subdivisions - wood block. The Intelli Imt301 has Large LCD screen simulates swinging of pendulum. Tempo is quickly selected with center circular selector. Auto off function turns the unit off of 3 minutes of no signal detection. All settings are maintained after the unit is turned off. Digital Auto Tuner Features: Dual mode -- choose either chromatic or guitar. Built in microphone for acoustic instruments or an input jack (1/4") for electric instruments or for a contact mike/pick up for easier more accurate tuning. Pitch shift 430 Hz to 449Hz in 1Hz steps and Quadra Flat Tuning - flatting 4 steps. 3 Color Leds shows in tune or miss tune. LCD meter indicates how closely it tuned in cents scale. Tuning range A0-B7 - 8 octaves. Thermo - Hygro-Meter: Dual mode -- choose either chromatic or guitar .Built in microphone for acoustic instruments or an input jack (1/4") for electric instruments or for a contact mike/pick up for easier more accurate tuning. Pitch shift 430 Hz to 449Hz in 1Hz steps and Quadra Flat Tuning - flatting 4 steps. 3 Color Leds shows in tune or miss tune. LCD meter indicates how closely it tuned in cents scale. Tuning range A0-B7 - 8 octaves. Pitch Generator: Quickly change the note with the center circular selector. 88 notes in a chromatic scale. The volume is controlled continuously - this is a loud generator. Specifications: Earphone jack - Earphone is not included. Uses a 9 volt battery -included - or has plug for an AC adapter / Battery eliminator. Flip out metal stand. Dimensions: 1.75"x 5.75"x .75" - weight 6 oz. Includes vinyl carrying case. 1 year warranty.