3 AAA batteries (batteries not included). Product size: 7*3cm. IP68 waterproof, can be directly put into water, the shell is made of ABS material, with 13 super bright lamp beads. RF wireless remote control long range 5-10 meters (can be controlled without aiming the light) Comes with magnets and suction cups for easy installation. 21-key RF remote control can adjust light, color, brightness and dark, and has a synchronization function. Scope of application: suitable for swimming pools, ponds, bathtubs, aquariums, baby bathtubs, emitting toys light for children, stages, nightclubs, vases, shopping malls, jewelry stores, showrooms, showcases, cabinets, museums, stores, home lighting bulbs and other occasions.