100% New And High Quality Fast Heating - The carbon fiber heating wire is used for rapid heating. It provides comfort and heat treatment which helps relieve knee arthritis pain and reduces knee discomfort. Shin thighs and arms can also be used to relieve muscle soreness and cramps. Three Temperature - One button control 3 mode temperature settings. You have complete control over the heating temperature. You can change other temperature settings after a short press of the button. Multiple Occasions - It suitable for travel or indoor use. You can plug it into a wall outlet and make it a versatile car / USB port and work properly. It doesnt built-in battery so it cant be charged. Comfort and Safety - The strap is long enough. When you sit down stand or lie down the cable allows you to enjoy endless heat treatment comfort. The heated knee pads are made of carbon fiber and neoprene which is safer and softer than other heating materials. Specifications Name: Heated Knee Pad Temperature: Three Mode Adjustable Temperature Range: 45-55 Degrees Celsius Package Included:1 /2pcs x Heating Knee Pad Note: 1. Due to the different monitor and lighting effect the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)