That means you (the customer) DON'T want to use the other FedEx option. This also means YOU will arrange the shipping, i.e. you will notify our office when to expect the courier, that will pick up the shipment at our office. Also this means the package becomes your responsibility once it leaves our office.
"Ok, but why is it FREE?" - Well, if you look carefully, the FedEx option has a cost associated to it, that will be added to the cost of the devices you purchased, hence if you arrange your OWN shipment, the amount that will be added to your Checkout basket is 0.00 (which 2CheckOut interprets as FREE).