PCB size : 71.4mm X 66.0mm X1.6mm

Indicators : PWR, status LED, net LED

Power supply : 5V

Communication Protocol :UART

RoHS : ...

• Input voltage : 110-240V AC, 50/60 Hz
• Output voltage : 5V DC
• Output current : 2 Amp (Max.)
• Output wattage : 10 Watt (Max.)

Official Raspberry Pi 4 USB-C Power Supply - 15.3W - 5.1V 3A

1. Short Circuit, Over Voltage & Over Current Protection
2. Incredibly Low Fault Rates
...

This is a super mini Solar Lipo charger based on the CN3065 - a single lithium battery charge  maximum charge current of 500mA with a maximum input recommended  of 6V (minimum 4.4V).