... . Work principle: The LED Light can send out colorful light, then the light are guided through the light guide plate then reflect ... off and rewrite.Structures of led writing board: Free Accessories power adapter*1, hand controller*1, soft cloth*1, chain ... -----red, green, purple, yellow, pink, orange, white, blue.Remote controllerLi-battery: 1800MA, 2800MA, 5500MA Different flash modespurple, green, ...