RadioShack Advanced 3-Station 3-Channel FM Wireless Intercom System (43-3105) - Home, Office & Business Communication Solution

I have 9 of these FM intercoms that use the house electrical wiring for transmitting the signal between intercoms. Been using them since the late 90s when I lived near Dallas TX. Just plug it in and select one of the three channels with a slide switch for each of them, choose the volume you want with an easy turn dial, and you are ready to communicate. Our house has three floors plus a garage and we have them conveniently located on all of the floors. Push-to-talk is very simple. I decided to get one more and had to get a package of 3, but that is fine. Over the years one of the nine needed to be replaced so having 2 more is fine with me. We live in an area in CT that is not close to where there might be interference so they work noise free. My brother, who lives in the heart of Washington DC bought them but there was too much interference there so he stopped using them. I was delighted to find that although Radio Shack stores no longer exist, this product was still available through Amazon. Were delivered, brand new, within a day or two. A caution is to not have two of them close together in the same room or they will screech when pushed. I have one in a basement bathroom and in the basement office so it is necessary to keep the bathroom door closed or nearly so, to avoid screeching (feedback).