Very easy to use. I bought a "Squish Wireless Car Charger, Auto-Clamping Qi Fast Wireless Charger Phone Holder for Car Air Vent" that comes with a USB port. Just install the charger and plug the charger into the charging adapter and it works flawlessly while fast charging my iPhone X in the ORDTBY waterproof case. I loved my squish setup so much I ordered a second set for my wife's car so she can charge her iPhone XR which is in a thicker case. She likes it too, no problem. Outstanding quality and design!