I have two of these inverters. One protects a Mac Mini that I use as a multimedia server and the other Synology NAS. USB connected both are properly recognized and it sets the extinction of connected devices from a percentage threshold for example. There are 3 outlets connected to the battery and 3 taken just protected against overvoltage. Its compact design allows you to hold it in such a TV cabinet that is not possible with others. I highly recommend it.