“My office is in the back of my home and I can’t hear the doorbell from there. Also, UPS and FedEx do not knock and I want to get the packages into the house. I placed my TX1000A out of the way under the roof of the porch and it alerts me of any person at the front of my home. If I am waiting for something to arrive, I can take the RX1000A receiver next door to my mother’s home so that I will be alerted while I take care of her. I like it a lot. I’m considering buying another RX1000A so that I can monitor my mother’s home at the same time.”