BBC micro:bit Micro-Controller Microbit V2.21

Overview
BBC micro:bit V2, Upgraded Processor, Built-in Speaker and Microphone, Touch Sensitive Logo

Features
Processor: Nordic Semiconductor nRF52833
Memory: 512KB Flash, 128KB RAM
Interface Chip: NXP KL27Z,32KB RAM
Microphone: MEMS microphone and LED indicator
Speaker: On board speaker
Touch: Touch sensitive logo pin
Edge Connector: 25 pins, 4 dedicated GPIO, PWM, I2C, SPI and ext. power. 3 ring pins for connecting crocodile clips/banana plugs. Notched for easier connection
I2C: Dedicated I2C bus
Wireless: 2.4GHz Radio/BLE Bluetooth 5.0
Power: 5V via Micro USB port, 3V via edge connector or battery pack. LED Indicator, Power off (push and hold power button)
Current available: 200mA available for accessories
Motion sensor: ST LSM 303
Software: C++，Makecode，Python，Scratch
Size: 5cm(w) x 4cm(h)