... 4.with dual usb port laptop car charger auto electronics car power adapter for laptops,ultrabooks,tablet pc SPECIFICATION:1.input:12-24v DC2 ... 61*32*20 mm5.warranty:12 months With the USB Car Charger Adapater,you can keep your device fully charged ... the USB car charger adaptor to charge,using you USB charging cable. laptop car charger auto electronics car power adapter for laptops,ultrabooks,tablet pc