Using your Makita DCB200A 18V LXT Lithium-Ion Cordless Heated Blanket is easy. First, insert a fully - charged 18V LXT® battery (sold separately) into the zipper pocket. Then, turn on the heat controller. You can choose from three heat settings (high, medium, low) according to your needs. You can wrap the blanket around your waist or shoulders using the snap buttons and strap. You can also use the USB port on the power source to charge your portable electronic devices. When it comes to maintenance, the blanket is machine - washable and dryer - safe. Just make sure to remove the battery before washing. Only use genuine Makita batteries and chargers to ensure safety and performance. Remember, there's a 3 - year limited warranty on the heating element and electronics only.