Using this USB lead is easy. Simply plug the male end into one device and the female end into another to extend the USB connection. When using it, make sure the devices are turned off to avoid any electrical issues. For maintenance, keep the lead away from sharp objects to prevent cuts. Also, don't bend the lead too sharply as it may damage the internal wires. If you notice any signs of wear and tear, it's best to replace the lead to ensure a stable connection.