Details 1. Assemble the magnetic letter lights. Select the desired letter light and place the controller at the starting, middle, or ending point of the letter light. 2. Connect the magnetic letter light to the power supply. Connect the TYPE-C cable included in Touch Dimmer or DC12V1A, Apple Lightning Cable to the controller and provide power to the adapter or TYPE-C cable 3. Turn on the magnetic letter light. Touch the fingerprint switch on thecontroller to see all lights illuminated, hold to a