1. Operating voltage: 5V
2. Operating current: 76mA @all LEDs light up, playing a 1kHz sound at volume level 6.
3. Operation mode: stand-alone, networking
4. Includes 16 touch interfaces
5. Audio sources
   - Integrates 13 MIDI groups
     ⬥ Grand Piano, Rhodes Piano, Music Box, Tubular Bells, Hammond Organ, Percussive Organ
       Clean Electric Guitar, Synth Bass1, Pizzicato Strings, Timpani, Woodblock, Gunshot, Percussion
   - Audio sources can be added via the on-board USB interface
     ⬥ Supports mono .wav files
6. Flash memory: 128Mbit
7. Speaker: 8Ω/2W
8. Interface: UART (baud rate: 115200bps)

The product integrates 13 MIDI groups and allows you to add your own audio sources via the USB interface. It's easy to use, simply select a MIDI, connect the 16 touch interfaces to objects using crocodile clips, and you can start creating music.
Except for the 13th MIDI (Percussion), the 16 touch interfaces correspond to different pitches. When a touch is detected, the corresponding LED lights up. Additionally, the product includes buttons for adjusting volume (level 0 to level 15), audio sources, and MIDI groups, making operation easier.

Other pins are not used.

1. MCU:
   1. Holtek HT32F61355, 32-Bit Arm® Cortex®-M0+ Music Synthesizer MCU, including datasheet, package information, etc.
   2. Holtek BS83B16C, Touch I/O Flash MCU, including datasheet, package information, etc.
2. IC: Holtek HT82V73A, 1500mW Audio Power Amp with Shutdown, including datasheet, package information, etc.