This product now includes free next business day onsite replacement ndash for further details please click here for a limited time this wireless controller comes with the 80211n upgrade included in the price the netgear prosafe 20 ap wireless controller wc7520 offers a high performance and fully featured wireless lan architecture to meet the demands of medium sized businesses schools and hospitals with up to 1 500 users and more focusing on ease of use the wc7520 controller si