Using this waterproof heated mattress pad is easy. First, place it on top of your mattress. For Twin and Full sizes, connect the single controller; for Queen and King sizes, connect both controllers. Then, plug it in and use the controller to select your desired heat level from the 10 available settings. You can also set the automatic shut - off timer from 1 to 12 hours for safety. When it comes to maintenance, simply toss it in the washing machine as it is machine - washable. Remember to unplug the pad before cleaning. Don't use harsh detergents as they may damage the fabric. After washing, let it dry thoroughly before using it again. Enjoy the cozy comfort this heated mattress pad brings to your bed!