RioRand RRDSC12-5V3A DC Power Supply Converter Inverter (12V to 5V 3A 15W with Dual Female USB for Car Vehicle (Apple Products Requires Certain Circuit) Powered by RioRand Advanced Technology All epoxy sealed containers with Waterproof Housing; Non-isolated High efficiency: &gt;96%; Reliable, low heat dissipation max. 40 With overload / over-current / over / low voltage protection, stable performance