The composite fiber heating sheet is a good electrothermal conversion material, fast heating. High efficiency, good heat preservation and energy accumulation, soft and flexible texture, light and thin, durable and long life. The heated gloves cover sheet the entire back of the hand and all the fingers. They can keep your hands warm when it's cold when skating, skiing, running, hiking, fishing, hunting outdoor sports. You Can Make It Yourself By Adding It To Your Favorite Glove And Connect It To The 5V2A Mobile Power Supply. Infrared heated elements can stimulate blood circulation, especially good for Arthritis, Bad Circulation, Stiff Joints. Attention USB heating gloves with on-off controller, this product has only one button, but it can adjust three levels of temperature, respectively 50 / 45 / 40. USB heating gloves with on-off controller, button light color is red at 50, blue at 45 , green at 40. USB heating gloves without On-Off Control, it has only one level of temperature, is 50. As for With On-Off Control/without On-Off Control. The two products have the same maximum size, the maximum length is 22cm (22cm = 8.66inch) and the maximum width is 19cm (19cm = 7.48inch). Specifications Item name: Glove Heating Sheet Type: With On-Off Control Material: Composite Fiber Color: White Input Voltage: 5V Quantity: 1 Pc Package include: 1 x Glove Heating Sheet Note: There might be little error of size for manual measurement. The colors deviation might differ due to different monitor settings, please kindly understand.