DB-30 Dr. Beat

Purchased for practice at a hotel during a business trip.
Sound output confirmed, switches and volume are normal.
The instruction manual can be downloaded from the manufacturer's website.
It was used indoors, so there are no noticeable scratches and it is clean, but there may be minor scratches that were not noticed.
A new coin battery is included.

Main Specifications:
Metronome: Tempo = 30-250 bpm (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 types), Rhythm = quarter note, eighth note, eighth rest, triplet, skipped triplet, sixteenth note, sixteenth rest, CLAVE1, CLAVE2 (9 types)
Reference Tone: Reference Frequency (A4) = 438-445Hz (1Hz steps), Sounding Range = C4-B4 (accuracy ±1 cent)
Auto Power Off: 60 minutes
Memory Function: Remembers settings when power is turned off. (Mute status is not remembered)
Display: Custom LCD display, Tempo indicator x 2
Terminals: PHONES jack (stereo mini type)
Power: Lithium button battery (CR2032) x 1
Current Consumption: Less than 10mA (when reference tone is sounding)
*Battery life during continuous use (varies depending on usage conditions) = approx. 20 hours
Accessories: Lithium button battery (CR2032 3V) x 1, Instruction manual
External Dimensions / Weight: Width (W) 61 mm, Depth (D) 90 mm, Height (H) 20 mm, Weight 70 g