1. Operating voltage: 5V
2. Operating current: 285mA @5V (Audio: 440Hz, maximum volume)
3. MCU: HT32F61357
   - Integrates 128Mbit Flash memory
4. Sounds: compliant with General MIDI
   - 128 melodic sounds
   - 61 percussion notes
5. Audio output
   - 8Ω/2W speaker (PH2.0-2P connector)
   - Earphone (Ø3.5mm earphone jack)
6. Piezo interface: connects to a ceramic piezo sensor to detect playing force
7. Keyboard interface: support 8x8 matrix keys
8. Includes metronome function
9. Customize MIDI tracks and play it through a speaker or an earphone
10. UART interface (baud rate: 31250bps)

The product is designed as a shield, allowing users to easily insert it into BMduino-UNO BM53A367A or Arduino UNO. It offers flexibility for users to configure various parameters, such as sensitivity, force levels, MIDI pitch bend, and more, to create truly unique and customized MIDI tracks.

Additionally, it includes a multi-functional button that can be controlled in five directions: up, down, left, right, and center. You can achieve different functions by controlling the button.

The rest pins are not used.

1. MCU: Holtek HT32F61357, 32-Bit Arm® Cortex®-M0+ Music Synthesizer MCU, including datasheet, package information, etc.
2. IC: Holtek HT82V73A, 1500mW Audio Power Amp with Shutdown, including datasheet, package information, etc.