Easy To Use: Come without CR2032 batteries Unscrew the back cover to replace batteries when needed. Kindly Note: Twist the back cover to active the lights, some may need harder to twist.Submersible & Waterproof:Made of high-quality acrylic. With a sealing ring to prevent the battery and LED lamp from getting wet, which can be submerged into the water, suitable for mood lighting such as Vase,Pond,Aquarium,Fish Tank light,Pool.Widely Use :Suitable for decorating Wedding, Party, Birthday, Festival, New Year or any other Celebrations at night. You will be amazed by the amazing effect providing with an exquisite sensation for your home.Safer in any time :Our waterproof tealights can be used without having to worry of flame, absolutely No fire hazards or burning risks, No hot and dirty wax to deal with.What You Get:These submersible LED lights come packaged in packs of 12.This product does not contain batteries.