The Vodool 54W USB 2.0 4-Port Universal Car Charger intelligently identifies your device and provides suitable output current by maximized charging speed. It fits all standard 12v /24v cigarette-lighter sockets and transfers Qualcomm Charge 2.0 enabled devices up to 75% more power than the conventional charger. Typically, a Quick Charge 2.0 enabled device (3300 mah) goes from 0% to 60% charge in 30 minutes. With auto-detect technology, each port intelligently identifies your device and seeks to maximize its charging speed for non-quick charger 2.0 devices such as iPhone and iPad. The charger is also suitable for all Android & Apple smartphones device with USB charging port. This portable car charger simultaneously charges up to 4 devices and delivers a whopping 54 watts of power at once. It has been made with fire-resistant materials for your safety.