Title: Works as advertised!
Review: My garage is a separate building about 15' away from my house, so I needed something to tell me if I left the door open. I'm using this about 100' away from the transmitter - a bit too much for it. It worked fine at first, but then would lose signal on occasion. I noticed that the receiver had an antenna but the transmitter didn't. I opened up the transmitter and found the antenna "loop" - I simply soldered on a piece of wire of the appropriate length (this uses 390mhz, so I used a 1/2 wave length of wire, which is 14.4 inches). Works perfectly now!
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