The Good Times GT-100-FPL-2-WR magnetic underwater LED pool lights is specifically designed for above ground pools with either vinyl or steel walls. This unit uses an internal magnet to affix the light to the inside of the pool wall. It's completely waterproof and submersible to provide ambiance that's quick and easy to install and remove. Simply follow the directions to add 3 AA batteries to the light (not included). Press the remote button once to turn the light on to the low setting, twice for the high setting and a third time to turn the unit off. When using the light with a Vinyl sided pool, ensure the wall thickness is no greater than .5mm. Place the included steel plate on the outside of the pool at the desired location. Then, slowly slide the light down the wall on the inside. When the light lines up with the magnet, it will engage. Easy. When using the light on a steel walled pool, simply place the light on the wall and slide it to the desired location. Once installed, use the remote to turn your lights on and off. Though designed for above ground pools, this versatile light is also extremely handy in many camping, hiking or RV applications. Please note: The remote control is not waterproof. Do not submerge. Warning: This item contains strong magnets. Keep light away from young children, mobile phones, magnetic media such as hard drives and other electronic devices.