- OLED display: Visual data display without connecting to PC, which enables debug in a more efficient way, and builds application such as a sensor hub, data monitor system, .etc

- RESET button: No more jumper wire and short circuit, easy reset with just one click.

- SWD debug: SWD pin led out as male pin header, making debugger connection and firmware download much easier.

- High precision RTC: High precision real-time clock with battery backup, enable maintain accurate time when the main power is turned off.

- Expandable memory: With a MicroSD card slot on the back, no worry about the memory limit any more when adding libraries and using circuit python.

- User button: Besides the RESET button, also provide another user-defined button.

- Passive buzzer: Same passive buzzer on Wio Terminal, with which you could change the PMW frequency to award different beep sound to get a "buzzer music".

- Grove connectors: All pin led out, plug and play grove connectors support common data protocols (Grove IIC2, Grove UART1, A0/D0 Grove*1)

- Lipo Battery Charging: JST2.0mm standard lipo battery connector and battery management system, supports both USB and lipo battery power supply, and easy onboard battery recharge.

- 5V servo connector: 5V output led out to male header for 5V servo and sensor connection.