Using these USB adapters is a breeze. For the PF020 adapter, just plug the USB 2.0 A end into your computer's USB A port and the USB C end into the device that needs a USB C connection. This way, you can enjoy a data transmission speed of up to 480Mbps. For the PF030 adapter, connect the USB C end to your notebook or mobile phone with a USB C interface and the USB 2.0 A end to your U - Shield or USB disk to use the OTG function. When it comes to charging, you can connect either adapter to a charging cable or phone charger to charge your devices at a rate of up to 3 amps. As for maintenance, keep the adapters clean and dry. Avoid exposing them to extreme temperatures or moisture. Also, be gentle when plugging and unplugging the adapters to prevent damage to the connectors. When not in use, you can use the included lanyards to keep them organized and easy to find.