My dads looking for a wireless bird box at a average price does anyone have any suggestions
edited March 2018
I have seen this one - I have no personal experience of camera nest boxes however, so I won't pretend to be able to give any advice!
I have one which is very similar to the above and it works well (although I do have the receiver quite close to the camera so not sure what the range is). Unfortunately the birds avoid it like the plague though, perhaps because it's sited somewhere to exposed. I plan to move it next year. It does need mains power for the camera unless you get the optional battery pack.
How about adding one of the small wildlife cameras to a existing bird box? Wouldnt need power.. but would need battery changed every now and again. a friend had one of these which was quite good -