Step 1: Put 4 AAA batteries in, or just plug the USB cable tightly in the USB port.
Kindly note that AAA batteries are not included with your order.
Step 2:First, turn on the switch on the backside. Now touch the smart-touch sensor (the circle) on the mirror, and the mirror will light up.
Step 3: Second, touch the smart-touch sensor for a couple seconds. This will dim the brightness seamlessly. Simply remove your finger from the sensor when it reaches your preferred brightness.