GAOHOU DC 5V 3-Shift USB Electric Cloth Heater Waterproof Warmer Pad Heating ElementFeatures:Quantity: 1pcsThis 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.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 free to choose.Press and hold for 5 seconds to turn on the switch.Small size, light and easy to carry.Specifications:Material: Carbon fiberMaximum voltage: 5 (V)The main purpose: Cushion clothing fever tabletsScope of application: 35-50 degreesSize: about 23.3 x 29.4cm/ 9.17 x 11.57inchLine length: about 1.44 meters/56.69inchSwitch: Silicone third gear thermostatColor: BlackUse method:1. Connect the computer USB interface2. Connect the power bank3. Use with 5V 1A or (2A) power adapterNote: Only In insulation environment such as sewing clothes or pillow quilt covered case, will be heated to 35-50 degreesPackage Includes:1 x 5V 3-Shift USB Electric Cloth Heater Waterproof Warmer Pad Heating Element