Dual-core Arm Cortex M0+ processor, flexible clock running up to 133 MHz Onboard PCF8523 RTC chip, provides precise RTC information Onboard MP28167-A buck-boost DC chip for fast load transient response Onboard user-defined button, can be used for Raspberry Pi start up, safely shutdown, or other customized function Protection circuits such as: power supply anti-reverse, counter current proof, etc. ensures stable and safe operating Voltage/current monitoring circuit, monitors the Raspberry Pi operating voltage and current in real time