The skin should be clean and dry. Place the FAQ 221 LED mask on the back of your hand and attach it to your wrist with the gold chain. Press the universal button to turn it on. With another short press, the LED colour changes. You can use the FAQ Swiss app to use pre-programmed routines and other settings. Just download it and get started. Relax for up to 15 minutes and enjoy the application. Then repeat the process on the other hand. Press and hold the power off button for 3 seconds.