This Battery Operated Taper with Timer is a great primitive decoration. It is approximately 6″ and requires 2 AA batteries (Not included). Simply add batteries & twist the bottom on tight until the light comes on. Timer candles stay on for 6 hours & go off for 18 hours. The 6 hours begin as soon as you twist the bottom on. If you wish to reset the timer, turn the candle off by undoing the bottom of the candle & then turn them back on at the time for which you would want them to be set. Two wonderful primitive colors to choose from!