DC 12V 24V 40V to 5V step down step down power module USB

DC / DC converter from 12V to 40 Volt input voltage to 5V USB voltage transformed down, power module to 8AH as specified (not measured). My application is in mobile homes. Navigation device, MP3 player and Smartphon be loaded and used simultaneously. Furthermore, lights in the dark even a USB LED Reading Light. When occupied by the mentioned devices, the power module is somewhat warm but not hot, so reserves are still available. Who is happy with an open module and the low price as I do, I can recommend the module with best conscience. The module is solid and therefore makes a good impression what can be obtained on the shelf. Comparable I've ever seen anywhere. Super part.