The piano shield for micro:bit integrates the TTP229-LSF chip, 8 touch piano keys, 4 WS2812 LEDS and a passive buzzer element.
It also comes with 6 edge connectors, containing two 3V power input/output connectors, 2 signal connectors. So it provides an easy way to connect other sensors/modules to micro:bit main board.
Besides, it extends 2 rows of header pad interfaces, easy for soldering the pin headers/female headers of 2.54mm pitch. One row contains 3V power input/output and SPI communication; the other contains 3V power input/output, signal pin and I2C communication.
The shield has two 3.2mm fixed holes, convenient for mounting on other devices.

Technical Details

• Power supply from:
• micro:bit main board: Micro USB port (5V); external power jack 3.3V
• Piano shield: edge connectors (3V); header pad interface (3V)
• Control chip: TTP229-LSF
• Dimensions: 124mm*55mm*10mm
• Weight: 29.9g 

https://wiki.keyestudio.com/KS0440_Keyestudio_Piano_Shield_for_Micro:bit_(Black_and_Eco-friendly)

Resources

• BBC micro:bit website
  
• Micro:bit MakeCode Block Editor
  
• Meet micro:bit starter programming
  
• BBC micro:bit Features Guide
  
• BBC micro:bit Safety Warnings
  
• BBC micro:bit Quick Start Guide
  
• BBC micro:bit Pins