Hardware SpecificationsChipset:ESP32 WIFI/Bluetooth USB TO TTL:CP2104 LCD:0.96 IPS LCD Heart rate blood oxygen sensor:MAX30102 Six-axis attitude sensor chip:MPU6050 RTC:PCF8563 Customizable buttons:Button Battery:200mah Charging voltage and current:5V,500mah More Information: https://github.com/Xinyuan-LilyGO/LilyGo-HeartRate-Kit