Tempo Range: 40–208/minute (BPM)Beats: 0–7 beats, duplets, triplets, triplets with middle beat omitted,quadruplets, quadruplets with middle beats omittedTempo precision: +/-0.2 %Reference tones: C4–B4 (C, C#, D, E, Eb, F, F#, G, G#, A, Bb, B)Calibration Range: 413 Hz–420 Hz, 438 Hz–445 Hz (1 Hz steps)Reference pitch precision: +/-1 cent or betterConnector: 1/8" mini-jackSpeaker: Dynamic speaker (28 mm diameter)Power supply: Two AAA batteries, 3V (included)Battery life: Approximately 250 hours (tempo 120, time 4, using zinc-carbonbatteries)Dimensions (W x D x H): 104 x 64 x 15 mm / 4.09 x 2.52 x 0.59 inchesWeight: 57 g / 0.13 lbs. (without batteries), 79 g / 0.17 lbs. (including batteries)*Ver video demostración del equipo en YouTube charroferrari