Using this SPST mains rocker switch is a breeze. First, make sure the power is turned off to avoid any electrical hazards. Then, connect the wires to the 6.4mm spade terminals. It fits into a cutout size of 30.7mm X 22mm with an outer trim of 31.5mm X 25mm, so just place it in the appropriate spot and secure it. When using, simply flip the rocker to turn the circuit on or off. As for maintenance, keep it clean and dry. If you notice any signs of damage like loose connections or a broken rocker, stop using it immediately and contact a professional. Since it comes with a full guarantee, you can rely on us to assist you with any issues.