C: You can set up hot key.You can set up your own hot key, after you click hot key, PC A mouse(mouse arrow) will jump to PC B.B: Double click mouse wheel when mouse at PC A,and double click mouse wheel,mouse(mouse arrow) will jump from PC A to PC B.A: Use mouse roll over monitor.When you roll over the mouse on moniter, mouse(mouse arrow) will jump from PC A monitor to PC B monitor, now you can use PC A mouse(mouse arrow)to work PC.How to use KM switching between two PC or Laptop? It has a few ways.LED lights on the cable let you know that the transfer is in progress. It is with 2m length, so you'll have ample length to connect 2 computers. The included USB 2.0 high-speed cable provides transfer speeds of up to 480 Mbps and is backward compatible with USB 1.1.The USB 2.0 transfer cable lets you transfer files between two computers including Windows to Windows, Windows to Mac, Mac to Windows, and even Mac to Mac.The data transfer cable supports Mac OS 10.7.5 to 10.10,Windows XP, Vista, 8 and 7,and Windows 8.1, Windows 10. Buy ZIMO, Switch-to-MAC USB 2.0 Transfer Kit Data Link Cable, MAC to PC/PC to PC/MAC to MAC File Transfer Share, Length: 165cm: USB Cables - FREE.such as email, music, photos, videos and document files.Plus, there is no additional driver to install when connect your computers.Easier than network transfers, no size limits, and simpler than disk transferring. Ugreen USB easy transfer cable allows you to transfer files from your old computer to your new one over USB 2.0.