•【Memory & Synchronization Function】When you use wall switch turn on the light bulb it can memory the last color or mode you used. The synchronization function is an innovative technology for the use of multiple bulbs in the same lamp, such as fan lights, bar lamps, chandeliers, table lamps, and more, When we use flash or smooth modes, the rhythm of the color changing of the bulb can always be consistent. Note: One remote control can control all bulbs.