Soondar 12x Submersible LED Vase Light Waterproof Wedding Floral Decoration Party Tea Light for Wedding/Party/ Xmas Floral Decoration, 7 Color Automatically Change, with Remote(On/Off Function) Submersible Bright Light for wedding, pool,arrangements and some special events 2pcs CR2032 Batteries included; Batteries can last 15-30 hours. They can be easily replaced. Please note the +/- polarity when you replace the battery. The + polarity should on the down side. Unit Dimension: 30*30*25mm. Battery last time: 15-30 hours