This small switch mode power supply can supply 5VDC at up to 2A by way of a normal USB female port. This can accept any standard USB cable and can be used to replace any standard “USB charger” for your phone or other portable device. These are often used to power microcontrollers and small single board computers and are an ideal choice for the Raspberry Pi Pico, Adafruit Feathers, the Arduino family, and more!