This UPS HAT is Designed for Raspberry Pi series, compatible with Raspberry Pi 3 / 3B+ / 4B, etc. I2C bus communication, monitoring the batteries voltage, current, power, and remaining capacity in real time Multi battery protection circuits: over charge/discharge protection, over current protection, short circuit protection, and reverse protection, along with the equalizing charge feature, more safe and stable Onboard 5V regulator, up to 5A continuous output current, more sufficient power source for Raspberry Pi.5V USB output, convenient for powering other boards Batteries warning indicators, easy to check if the battery is connected correctly.Comes with development resources and manual