the battery candle light is operated by a controler (IC) which has four functions :quick flash ,slow flash,stable brightand off.various patterns and logo can also be added to the glass cover,at the bottom of which ,there is a switch . once touched ,the light can alter.the battery candle light can be put on the desk ,bed end ,or in the bar ,coffee bar for decorativeness.also ,it can be put in the pool,streem,and even sea to float with flashing lights as a decorative gift to enhance the season`s atmosphere.