Batteries: This device’s remote control operates on a CR2025 lithium 3v battery (Included) ***Remember to remove the plastic strip on the battery*** Operation: This bulb fits into any E27 socket. Next press the Green ON button via the remote. Use the remote to toggle between various settings and colors. The White “UP” and “DOWN” buttons in the upper left of the remote will allow the user to adjust the intensity of the selected color. Settings will be saved when the bulb is turned off.