Hi I'm putting my AV equiment in a different room to my screen so I need a remote extender, the reciever of which will hopefully sit under a chair in the lounge where the screen is. It will mainly be used to control SKY and the DVD player. I fancied these from letsautomate. My first question is are they right for the job. The second is that I notice that they operate in 433mhz which is the same as my wireless alarm system. Do you think this may cause a problem. Thanks in advance.