Boss DB-30 Dr. Beat Metronome

* It's portable, reliable, and fun to use - the DB-30 helps musicians take their music to higher levels by offering a set of features that defies its diminutive size. Much more than just a simple timekeeper, this pocket-sized metronome can lay down a variety of rhythm patterns and time feels to practice along with, and it has a few timekeeping tricks up its sleeve as well.
* Portable, ruggedly built, and packed with fun play-along patterns
* 24 beat variations with complex beats, and 9 rhythm patterns
* Large LCD with smooth tempo meter
* Tap-tempo feature
* 12 internal chromatic reference tones
* Convenient Phones jack and Auto Power-Off function
* MetronomeTempo: 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 ToneReference Pitch: A4=438 Hz-445 Hz (1 Hz steps)
Reference Tone Range: C4 to B4 (Accuracy: ±1 cent)Memory functionStores the settings when the power is turned off.Auto Power Off functionTurns unit off after 60 min.IndicatorsLCD Display, Tempo Indicator LED x 2ConnectorPHONES Jack (Stereo miniature phone type)Power SupplyCR2032 lithium batteryPower Consumption10 mA or less (with reference tone sounding)AccessoriesCR2032 lithium battery, Owner's Manual