Good morning bigD,
I see it's your first post here, so welcome to the community! Glad to see you're interested in our WiFi Booster. It's a one-time fee of $99.99 to buy it, and it comes with a 12 month warranty. Just give us a call at 866.347.3292 to order your booster, we'll ship to you for free.
Once you have the booster, here's additional information about it that you should bookmark for future reference.
Good question. Our wifi booster is dual-band!