Review on 🔁 TRENDnet TK-U404 USB 3.1 Sharing Switch: 4-Port for Computers & Devices, Flash Drive Sharing, Printers, Scanners, Mouse, Keyboard - Windows & Mac Compatible by Gary Lucas

This USB is the best I've found after trying at least 5 other brands. All others were garbage or fire hazards. One literally melted me because it didn't have reverse current protection. The only thing that could improve this switch is the power button. Just because one of the devices I connected it to is a Microsoft Surface Dock, which still outputs USB power to whatever is connected to the Switch even when the PC is off. Since the dock cannot be configured so that it doesn't, the only way to turn on everything connected to the switch is to unplug the dock from the switch. The power button would fix it, but whatever.