Battery-operated candles with multi-function settings; To illuminate the Christmas tree candle, simply insert 1x AAA battery(not included) into each candle. Then use the handy remote control to turn the candle on/off, choose 4hr&6hr timer function, and flicker/static/fade Dim lighting settings. Convenient operate. Elegance & Realistic flame; The candle bulb was designed teardrop shape, the flame looks round and pretty from any angle. The black wick and flame have been meticulously designed to perfectly emulate the real candle. When setting the flicker mode, the candle flame looks so realistic.