Review on Besgoods 5-Pack 10ft USB Extension Cables - Extra Long USB 2.0 A Male to A Female Cable with Gold-Plated Connector for Keyboard, Mouse, Printer - Black: Extend Your USB Devices Conveniently by Kevin Witherspoon

Not much to say about that. They are of great value and work as expected. I would be concerned about using a 3m USB extension cable with smaller power adapters, but I plugged them into a powered USB hub and have no problem using a keyboard and mouse in a large room. It should be noted that using USB extenders can be problematic depending on what is being used and which USB port or adapter is being used. With any cable, the voltage drops as it gets longer. So remember that there is a maximum usable length that you can extend a cable from any USB port/plug. For example, this might not be a viable idea depending on what you plug it into and what it's powered by.