I read the mixed reviews of this device, but felt that my use was over such a short distance and so far within the posted specifications that it would work for me. I was wrong. I tried a variety of placements of both the sender and the receiver and tried several reomtes. They hardly worked at all, when they did transmit the signal I had to hold the remote about an inch from the sending unit. One of the other reviews said that this device should not be sold. I agree,it should not be on the market.