【Automatic On/Off Timer】Equipped with a convenient one-button switch as the remote control is easy to lose and insensitive, it can automatically turn on the lights regularly at 6 AM, 10 AM, or 12 PM. You don't need to buy an extra timer. 【IP68 Waterproof】Since this aquarium light is waterproof, it can be fully submerged underwater or attached to the side of the aquarium. You can place it wherever you want with strong suction cups. 【Adjustable Brightness】The brightness and switches for the white and blue LEDs can be set from 10% to 100% individually or simultaneously. The adjustable white/blue/white&blue light color promises lush plants, clear and vibrant fish, and aquarium environments. 【Easy Installation】Easy to attach thanks to flexible suction cups that keep the light firmly and tightly on the tank wall. The 3W fish light is suitable for 20-40 cm aquariums; 5W is suitable for 30-50 cm aquariums; 7W is suitable for 40-60 cm aquariums, 9W is suitable for 50-70 cm aquariums. 【Wide Application】Widely used in aquariums, cisterns, rockeries, pet cages, reptile tanks, and more. Note: Do not put the power adapter and switch in the water.