BOSS DB30 metronome

BOSS DB-30
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.
• Handles time signatures up to 17 beats per measure
• Rhythmic beat patterns in various styles
• Headphone output with volume control

Specifications:
• 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
• Accessories: CR2032 lithium battery, Owner’s Manual