Feature :
Built-in 650mAh Rechargeable Lithium Polymer Battery
Battery charging/discharging status LED
Battery On/OFF Button
Built-in BQ27441-G1A fuel gauge for LiPo batteries
USB Type-C Charging
Overcurrent protection
Hiccup mode/Hiccup Protection
4 x Grove Analog/Digital Port
1 x Grove I2C Port
1 x Grove UART Port
Magnets are hidden inside the enclosure so that it can be stuck on the Whiteboard!

Certifications :
MSDS: Material Safety Data Sheet
UN38.3: UN38.3 Test Report
Air/Sea Certification for Safe Transport
1.2m Drop Test Report
RoHS: RoHS Test Report