AceList 24 x White LED Submersible Tea Light Candles with Remote Control Replaceable Coin Battery Underwater Waterproof Lamp for Christmas Birthday Use- White Remote ControlYou need to leave 40cm between these tea lights. Or they will change togheter if they are close. Submersible After tightening, can be a long time into the water. Suitable for parties, home decoration, weddings, DIY projects, backyards, schools, Christmas Day, bars, on the beach, on the grass and etc. Must be tightened in a clockwise direction. VARIETY OF USAGEThey can be used as decorations to be placed on votive candle holders. Use them during special occasions like parties, home decoration, weddings, DIY projects, backyards, schools, Christmas Day, bars, on the beach, on the grass and etc Long Time WorkWe have offer the free batteries in each tea lights. The batteries can work 30-70 hours. If you dont use the lights more than 2 hours, please loosen the plastic light case untill the lights are off. The lights will consume battery power if you just simply turn them off by remote controller. To save more power, please put the insulating strip back to the light or take out the batteries if you dont use them for a long time. (IMPORTANT) Battery ReplacementIt uses two CR2032 batteries, if the electric candles are not working, please replace two CR2032 in time. They will work again. The battery of remote controller is also replaceable.