Summary: Won't connect with any of my 3 devices.... I would say it is defective. They are all different operating systems and none of them connect with it. Tried different usb rf receiver that I know works with my other devices with no response. Also, changed the batteries giving it the benefit of the doubt.
Summary: When I read the description for this keyboard, I thought for sure that it would be larger. I am amazed with how small it is, and am even more impressed with how well it works. I've read a lot of complaints about how it doesn't work, or how it doesn't get the range claimed, etc. etc.