2 AAA batteries are Included for each candle to get you started. The batteries are shrink-wrapped in plastic that must be removed before using the candles. After the batteries are inserted into the removable center tube, gently push to turn on. This candle has a built-in timer function. When turned On – the light will glow for 6 hours, then turn off automatically for 18 hours, then turn back on again. 

Note:  As these candles are made of real wax, they can be damaged by heat.