A wonderful tool for a travel ritual kit, a safe way to leave candle magic burning overnight or unattended, for use in areas where an open flame would not be safe or for a safe addition or replacement for any candle decorations. Bottom unscrews to accept 2 AA batteries (NOT INCLUDED). Turning on and off is managed by unscrewing the bottom piece slightly (OFF) and screwing on completely (ON). Candle flame flickers randomly to simulate a burning candle wick. Will fit most standard taper candle holders. 1" x 6 1/4"