If you hear a "beep" after following these instructions, the device is functional.
Press the first button (the black one) then press on the second button (the red one). Check if the red light is blinking. At this point you just have to position the product on your neck and change the mode and / or intensity. As a reminder, this is an impulse massage which implies that the two magnets do not move.
You can see our getting started guide for more details: