Using this Emax Babyhawk II HD spare AIO mainboard is straightforward. First, make sure your drone is turned off. Then carefully remove the old mainboard and replace it with this new one. When installing, be gentle to avoid any damage. As for maintenance, keep it clean and dry. Avoid exposing it to extreme temperatures or moisture. If you notice any signs of wear or damage, replace it promptly. Always handle the mainboard with clean hands to prevent dirt or oil from affecting its performance.