Review on ASUS USB-N13 Wireless-N USB Adapter with Up to 300Mbps Wireless Data Rates - IEEE 802.11b/g/n USB 2.0 by Ngo Quang Cuong  (Cn ᠌

The biggest and main drawback of the operation of this device is that it refuses to maintain communication and speed beyond 4 meters of line of sight (((. Not to mention doors, especially walls, ceilings, and so on that can be found between this device (USB -N13) and a router (Asus RT-N13U). This feature was established experimentally, i. E. pushing the PC and the router in different directions after 4 meters (line of sight), the transfer rate dropped from 70 MB / s to 8 MB / s. If, however, I carried the devices between the 1st and 2nd floors, then the speed was lower than 0.5MB / s.