New & Improved - ValueRays Warm Keyboard Pad is a USB connected device with an on/off disconnect plug on the cord. The heated keyboard pad delivers "low volume" infrared heat to the surface of an ergonomic keyboard wrist pad offering warmth and support for typing. The pad is made of a soft foam creating the perfect adjusted height for the hands and wrists when using the keyboard. The pad is covered with a hand-washable black nylon sport fabric. The bottom has a non-slip surface, and a zipper closure makes it easy to hand-wash and air-dry when needed. After hand-washing, make sure the cloth is thoroughly air-dried prior to use. The ValueRays USB Warm Computer Keyboard Pad measures about 17" long x 3" wide x 1" high. There's a full zipper on one side of the heated keyboard pad to remove the cover. The interior is lined and includes a soft sponge support pad. "The infrared heating element is about 3" x 10" long," enclosed in metallic flame retardant fabric and attached to the USB cord. A handy plug is located on the USB cord to use the keyboard pad with or without heat. The low 5v infrared heating element is safe for people, the computer and the desk top. The low voltage produces a steady flow of warmth and ergonomic support for hands and wrists over the keyboard for typing. A USB 5v infrared heating element produces temperatures ranging from 99 to 104 degrees Fahrenheit. The warming keyboard wrist pad will begin to generate heat within a few minutes. ValueRays is the premier heated computer accessory Company established in 2008. Meeting the needs of our customers is the primary focus of our work. ValueRays is our Registered Trademark. Look for our logo ValueRays on all of our products. Thank you for shopping ValueRays!