These floating LED candles are designed primarily for indoor use, but they can be used outdoors in sheltered areas as long as they're protected from direct exposure to rain.

To replace the batteries, simply twist the bottom of each candle open and insert 2 AA batteries (not included) in the designated compartment.

Yes, the remote control can operate all 12 candles simultaneously, allowing for easy control of the lighting effects.

With proper use, the batteries can last for months, depending on the frequency of use and the quality of the batteries.

The candles can be hung from various surfaces using the included hooks and fishing line, making them versatile for ceilings, windows, and fireplaces.