Power for ONE or TWO 12V DC devices from car lighter socket instantly. If you have one tablet or videoplayer, then you connect one cable. If two, choose two cables. | 4.0mm tip positive barrel connector widely compatible with most car video players, DVD players or car tablets in market. | Over 100cm long coiled cord. LED to indicate power status. | With the highest quality materials and include safeguard features against incorrect voltage, short circuit, internal overheating | Cable length: 100 centimeters