How to Create or Making USB Power Injector

How to Make, Making Power Injector USB Modem, Wi-Fi. USB Extender with a length of more than 8 feet is often an error when used to connect the USB Air Card Modem and Wireless LAN. Actually, this error does not always occur in any type of device that uses USB Extender with over 8 feet long. For
example, a USB Extended through 12 meters, usually no error will occur
during their use of Flash