Descriptions: This USB heater pad can be washed, bent, rubbed, folded to use. Mainly used for neck, lumbar, back, abdomen, waist heating, cushion, pet bed heating, etc. Small size, light and easy to carry. Features: Can be washed, bent, rubbed, stitched on clothes. Can be used for neck, back, abdomen, lumbar heating. Silicone switch, waterproof, can be fixed around the sewing. Third gear thermostat, the temperature can be to choose. Press and hold for 5 seconds to turn on the switch. Small size, light and easy to carry. Specifications: Material: Carbon fiber Room temperature resistance: 6 (Ω) Maximum voltage: 5 (V) Thickness: 1 (mm) The main purpose: Cushion clothing fever tablets Scope of application: 35-50 degrees Size: 23.3 x 29cm/ 9.17 x 11.4inch Line length: 1.5 meters/59.06inch Switch: Silicone third gear thermostat Color:Black Use method: 1. Connect the computer USB interface 2. Connect the power bank 3. Use with 5V 1A or (2A) power adapter Package Included: 1 x USB Electric Cloth Heater Note :Only In insulation environment such as sewing clothes or pillow quilt covered case, will be heated to 35-50 degrees, the heating time in 20-40 minutes.