Product information: Size: 13 * 15cm cm. Weight: 317g. Fixed method: place the non-slip mat or fix it with double-sided tape. 3 speed selectors: cold wind / hot wind. It is ideal for defrosting or dehumidifying windows and windshields and can quickly remove car glass fog. Easy to use: Place it on the non-slip mat or secure it with double-sided tape, then connect it to the vehicle's cigarette lighter socket and turn it on. it makes little noise. Power supply: 12 V cigarette lighter ， Powerful heating power: 151 watts ， Auxiliary electric heater for your car Ball joint support: for ideal positioning on the dashboard Note: The cigarette lighter power is NOT less than 12V/12.5A/151W. Your car will be damaged if your car's output current is less. Note: This is for defogging only, not to help heat the set of your vehicle. So please DO NOT use it as a heater or it will let you down, hope your understanding! Product Information Product size: about 13.5*11cm Package size: about 13*8*15cm