Ambershine XXXXL size heating pad offers doublewide therapeutic coverage for sore muscles of your back, legs, and shoulders. With nearly twice the surface area of standard heating pads, it is ideal for wrapping around large areas to relieve arthritic pain, muscle ache and stiff joints. Use for just 20 minutes daily (or as recommended by your doctor) to increase blood flow and reduce pain and muscle spasms. Product Specifications Material: Ultra Soft Flannel Material Modes: 6 Power Heat Settings Size: 45cm x 85cm, 3M Extra Long Cord Power Supply: AC 120V, 60Hz, 100W Using Time: 2-HOUR Automatic Power Frequently Asked Questions: 1. What temperature does this product reach -Maximum temperature is about 176 F (80 C) when set to 6. Temperature varies by heat setting you may need to use a lower heat setting depending on the specific application and your personal preference. 2. How to set the automatic shutdown -All our heating pad is automatically shut off and you do not need to take any action. Note: Don't sit or put the pad underneath body. Don't sharp fold the pad while using. Please read the description carefully. Our heating pad is used for increase blood flow and reduce pain and muscle spasms. It really differs from normal heating blanket which aims to warm. It has its own heating range and special use methods. Please be clear about that you surely need a heating pad for health care rather than a heating blanket for warm before your purchase.