Each puck light uses three AAA batteries (not included) and the two remotes each use one CR2025 button battery (included). The light has four preset colors (white, red, green and blue) that are illuminated by tapping the light lens or using the remote. Using the remote, three special modes can be selected which show a range of 16 different colors including white as follows: Mode 1 = alternating solid light; Mode 2 = blinking light; and Mode 3 = sequentially blending light. Brightness is adjusted up and down by tapping the edges of the light lens or pressing buttons on the remote.
Installation: Discs of 1.5-inch 3M double-sided foam tape are included separately. The item description images are not accurate -- each puck light does NOT have full-sized tape attached to the bottom of the light unit.