Donner DBM-100 Rechargeable Metronome Tuner
- 3-in-1: metronome, tuner, rhythm trainer
- 30 to 280 bpm tempo range, beats 0 to 9
- 430 to 450 Hz adjustable calibration
- 5 tuning modes: C, G, U, B, V
- Rechargeable lithium polymer, USB-C, cable not included
- Headphone jack and volume control
- 5.9 oz pocket size
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A pocket practice tool for students and teachers that combines a metronome, a tuner and a rhythm trainer with feedback. Budget for a USB-C cable, since only the manual comes in the package.
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ASIN: B0F18Z4SDHModel: DBM-100Category: Metronomes
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Overview
Practice rooms, lesson studios and music stands are where this Donner device earns its place, combining a metronome, a tuner and a rhythm trainer. A built-in microphone listens to your playing and lights show whether you are on the beat.
The rhythm trainer checks whether your playing matches the click, which a plain metronome cannot do. Tap to detect tempo and selectable sounds add flexibility. The charging cable is not included.
Who it's for
Students working on timing, teachers in lesson rooms and wind or string players who tune at the stand get three tools in one. Gigging guitarists who tune between songs on stage will find a headstock tuner faster.
Pros and cons
- Rhythm trainer gives timing feedback
- Tempo detection button
- Wide tuning calibration range
- Multiple metronome sounds including voice
- USB-C charging cable not included
- Battery life not listed
- Menu button labeling differs from manual
Performance notes
The microphone compares your notes against the set tempo and lights indicate accuracy, so blind beat drills build internal timing. The color display uses full angle visibility so it stays readable in bright light.
Specifications
| Brand | Donner |
|---|---|
| Model | DBM-100 |
| Dimensions & fit | |
| Item weight | 5.9 oz |
| Capacity & performance | |
| Headphone output | Yes, headphone jack |
| Tuning range | 430 to 450 Hz |
| Tempo range | 30 to 280 bpm |
| Power & efficiency | |
| Battery type | Lithium polymer, rechargeable, included |
| Construction & materials | |
| Color Name | Yellow |
| Other details | |
| Connector Type | USB-C |
| Display type | VA HD color LCD |
| Beats | 0 to 9 |
| Tuning modes | C, G, U, B, V |
| Sound sources | 3 instruments, 1 vocal |
Frequently asked questions
Does the Donner DBM-100 use AAA batteries?
No. It has a built-in rechargeable lithium cell charged over USB-C. The USB-C cable is not included; the package contains only the manual.
What instruments can the Donner DBM-100 tune?
Acoustic and electric guitar, bass, ukulele, mandolin, violin, piano and wind instruments such as saxophone, flute, clarinet and trumpet.
How does the trainer rhythm mode on the Donner DBM-100 work?
The microphone detects whether your playing matches the current rhythm and gives feedback through a light display.
How do I change the tuning pitch on the Donner DBM-100?
Press the MENU button on the side, labeled C in the manual, to select tuner mode, then use the Up and Down buttons.