Turning on the switch on the back of the main unit will cause it to blink. (※Pressing it continuously changes the light pattern in 3 ways.) ● I have confirmed that it works, and it lit up at the time of testing. (Please note that it may light up during shipping.) The item has been opened from its bag once for testing. ● Due to being a mass-produced item, please refrain from purchasing if you are concerned about initial scratches, dirt, or initial defects. Returns are not accepted to prevent any trouble. Instant purchase is welcome! No discounts.