Micandle 24Pack LED Submersible Waterproof Floral Lights for Vases,No Flickering Battery Operated Underwater Little Lights for Party,bars,wine Glass and Special Events Decoration,in Blue 1)Size: 3 cm Diameter *2.5 cm Height(1.2 inch x 1 inch) 2)First,you need to take out the white insulator inside tea lights and tighten or loose the bottom of the candle for ON/OFF 3)It is waterproof,and it will submersible into water,not floating. 4) 60 hours long lasting CR2032 battery,which can be replaceable 5)Remember to turn it off to save battery if you no need to using them.