This is a remote control for IKEA LED light bulbs. It can control on/off, color temperature, and brightness. You can dim multiple bulbs simultaneously. This is an old model that has been discontinued, so it will be unavailable once the stock runs out. You can buy it on Amazon for 3980 yen, but I think a used one is a good deal. I no longer need it, so I am offering it for sale. The sale includes only what is shown in the photos, but you can find manuals and other information on the IKEA website and YouTube. I was using it until recently, so it is in working condition. Batteries are included.