AGPtEK 10PCS Submersible Waterproof Round Decoration Candle Lights With 3 SMD High Brightness LED, Coin Batteries For Pond Pool Bath Outdoor Garden Bar Disco Spa Tub Decoration Wedding-Warm White Submersible Bright Light for wedding, pool,arrangements and some special events 2pcs CR2032 Batteries included;it can last about 80 hours;the batteries can be replacable after using out Please note the +/- polarity when you replace the battery. The + polarity should on the down side. Unit Dimension: 30*30*25mm. Battery last time: 30-70hours Package include:10X LED Submersible lights;10X CR2032 coin batteries (inside the candles).