What do you want the camera for?
Wireless cameras are always a no-go in my opinion, too many devices can cause problems with the signal. Ok, so it's on the 5.8ghz band, which not too many devices are using just yet, but give it time - they'll soon be having the same issues as the 2.4ghz range, which most DECT phones, Broadband routers and video/audio 'senders' use.
I'd take the camera back and purchase a mid-range wired one. Sure, you'll have to run the wire into your house, but you'll certainly get a better picture. Take a look at:
Genie GS5324HIR - Super Hi-res Bullet in Digital Recorders at CCTV4u
Hope this helps!
Colin