Set of 24, Purple - JYtrend (TM) Waterproof Underwater Sub Submersible Battery Led Lights ~Tea Light-~Wedding~ Decoration ~ Party (24 Pack, Purple) Perfect for lighting up vases, bowls, or any water filled containers Can be turned on or off by twisting the base of the unit. Submersible,flameless,high safety. Use 2 x CR2032 Submersible Batteries which are included and are already installed. These batteries are replaceable Approximately 1" tall and 1.25" wide Battery last time:30-70hours