Using this heated mattress pad is a breeze. First, place it on your mattress, making sure it fits well (it can fit mattresses up to 21 inches deep). Then, plug in the controller. Twin and Full sizes have 1 controller, while Queen and King sizes have 2. You can easily adjust the heat level with 20 different settings to suit your comfort. For safety, the pad will automatically shut off after 10 hours. When it comes to maintenance, you can simply toss it in the washing machine as it's machine washable. Just follow the regular laundry instructions. Remember, this pad has minimal magnetic field emissions, so you can sleep soundly. And with a 5 - year manufacturer's warranty, you can enjoy peace of mind.