Serta Luxury Plush Electric Heated Triple-Rib Blanket - We've designed the Serta Triple-Rib low-voltage blanket with one thing in mind. To be the best, most comfortable and safest blanket that you will ever own. This electric blanket starts with super soft micro-plush fabric and decorative triple-ribbed design that is refreshingly smooth next to your skin for the ultimate in luxurious comfort and style. Constructed within the blanket is the patented Safe and Warm low-voltage technology. This low-voltage blanket includes a small power supply box that changes 120-volt AC home current into non-hazardous low-voltage DC current (very similar to a battery) to provide warmth, protection and safety even if the blanket becomes wet. Unlike other warming blankets with their thick bulky wires, the wires in the Serta blankets are so small and thin; they are virtually unnoticeable. The benefit to you is a blanket that gives more of an even heat and all over penetrating warmth with no annoying hot or cold spots. The king size blanket is divided in two separate zones and comes standard with two easy to read, easy to turn, non-slip computerized controllers to adjust the temperature of each side of the bed giving individual comfort and control. A giant backlit display with auto dimming feature provides more convenience for night time adjustments with out having to turn on the lights. It has an automatic pre-heat and hold feature that makes sure that your bed is warm and cozy before you climb in for the night. You simply turn it on and the blanket will warm up on HI until it reaches the temperature that you pre set your dial on and then adjusts itself to hold it there. For your safety, convenience and power conservation it has an automatic shut off feature that will shut the blanket off after 10-hour just in case you forget. It also comes standard with built in over-temperature protection for that extra bit of safety and peace of mind. Easy care machine washable and dryable.