LED Remote Small Controller (Optional Remote)The LED Remote Small Controller can be used to control colors, fade, strobe and dimming on both the RGB-GU10-LED, RGB-E27-LED and RGB-MR16-LED. It’s also equipped with Auto Flash and Fade pre-programs. Amazingly this little controller can perform all these functions, yet it’s only about the size of a credit card. The wireless remote controller controls color change by sending signals to infrared sensors on the lamps, but you can also select these built-in programs in the MR RGB lamps by cycling the input power on/off. Remote operates with CR2025 Battery. (Included), Note: This unit only works with RGB-GU10-LED, RGB-E27-LED and RGB-MR16-LED Bulbs.