DB-30: Dr. Beat Metronome Tempo: 30-250 (Accuracy: ±0.1%) BEAT: 0–9, 2+3, 3+2, 3+4, 4+3, 4+5, 5+4, 5+6, 6+5, 6+7,7+6, 7+8, 8+7, 8+9, 9+8 (24 kinds) RHYTHM: Quarter note, Eighth rest and eighth note, Eighth note, Triple, Triple with center rest, Sixteenth note, Sixteenth note with center rest, Clave 3-2, Clave 2-3 (9 kinds) Reference Tone Reference Pitch: A4=438 Hz-445 Hz (1 Hz steps) Reference Tone Range: C4 to B4 (Accuracy: ±1 cent) Memory function Stores the settings when the power is turned off. Auto Power Off function Turns unit off after 60 min. Indicators LCD Display, Tempo Indicator LED x 2 Connector PHONES Jack (Stereo miniature phone type) Power Supply CR2032 lithium battery Power Consumption 10 mA or less (with reference tone sounding) Accessories CR2032 lithium battery, Owner’s Manual Size and Weight Width 61 mm2-7/16 inchesDepth90 mm3-9/16 inches Height 20 mm0-13/16 inches Weight 0.1 kg0 lbs. 3 oz.