WIDE APPLICATION – 2.9×5.5cm/1.2×2.2inch( Height: about 5.5cm; Outside diameter: about 3.6.5cm.) Widely to supply power for Vehicle, GPS, Mobile phone, camera, mp3. suitable for any DC 12V-24V marine boat motorcycle, boat, riding mower, tractor, car, etc. PREMIUM QUALITY – Car cigarette lighter socket with cover is made of durable flame-resistant hard plastic, will prevent your devices from over-heat, over-current, over-voltage, over-load, and short-circuit., work perfectly with any car powered devices. EASY INSTALLATION – Each socket mounts with a retaining nut against a panel, the wire inline fuses to protect your plugs from being overloaded, safety and easy to install for daily use. “+ ” is for the positive pole,and “-” is for the negative pole. WATERPROOF & DUST-PROOF – Waterproof and dustproof by a rubber cover, protects the internal circuit, also allows it do good job on boat! 23.7 INCHES WIRE – Long wire can fit most car ,need not to worry about that the socket c