Features: DC5.5mm x 2.1mm 12V automatic cigarette lighter power adapter charger coiled cable is for car,truck,bus,truck,boats,etc.And this 12v cigarette lighter adapter is universally suitable for most household appliances,such as portable car air-pump,DVD-players,GPS,external-hard drive,LED light,etc The maximum extension length of this cigarette lighter power adapter coiled cable is about 3.3 feet, and the unstretched length is about 1.3 feet.It can be used as an extension cord DC12V car cigarette-lighter ,built-in replaceable fast-acting 3A fuse-to protect your car circuits and equipment.Cigarette lighter-plug with LED light: LED indicates whether you are working. This DC- automatic cigarette lighter power adapter charger coiled cable, convenient for you to power other devices through the car when you go out.The big end is inserted into the car cigarette lighter, and the small end is 5.5x2.1mm/3.5x1.35mm/4.0x1.7mm DC-plug The input voltage- is equal to the output voltage-, which is suitable for products- with a 12V 24V DC- interface. The input voltage- is 12V, and the output voltage- is also 12V Specifications: Line length:approx 40-100cm/15.75x39.37in DC- Type: 3.5x1.35mm/ 4.0x1.7mm/5.5x2.1mm Input: 12V Output: 12V Package Includes: 1PC Cigarette Lighter Cable note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.