RioRand DC to DC Converter Inverter (12V to 5V 3A 15W Power Supply for Car Vehicle with Dual Fixed USB) Brand: RioRand 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 Widely used in Car device, such as LED Display, Hard Disk Player, MP3, DVD, GPS, etc