PLEXXA&reg; Motorcycle Charger, 12V USB Power Supply Charger Port Socket Plug Charger for Mobile Phone GPS Device Size: Total length of about 8 cm, 2.3 cm in diam USB with a waterproof cover, waterproof and dustproof effect is good. Product use: for charging the mobile phone, GPS, car audio, car MP3 charging power supply, car vacuum cleaner power. With blue indicator light, electricity prompt. Note: Red line to connect power anode, black line to connect power cathode. Samsung 7562 I739 cannot use If you have any question, please feel free to contact us.