Dexim"s Visible Green Smart Charge and Sync Cable is the new and innovative way to charge your iOS device quickly and safely. Featuring electroluminescent (EL) technology,it features lights that visibly show the electrical current flowing through the cable. The current runs fast when your device needs a lot of juice, then as you get over 60% charge, the current slows down. When your device is fully charged, the Smart Charger intelligently shuts off power from the source, saving power and money.