This is for a pack of 24 of White Titan Branded Submersible Waterproof Underwater Lights. Each light includes the batteries. Twist the light for easy on/off. Batteries are easily replaceable (standard CR3032 batteries). The lights are approximately 1" tall and 1 1/4" wide. Use the lights anywhere you want to add color - weddings, fish tanks, pool, birthday parties or just daily use in your home.