I am very pleased with the SadoTech technology. I am using it in a very unique way. My wife had a stroke in June, 2020. I am the main caregiver now with assistance from both of our daughters. My wife can do a lot of things. She is semi independent. But, she requires my assistance from time to time. That requires her to signal me to come to her aid when she needs it. Somewhere on the SadoTech web site, I read that you can manually pair a button with a receiver. I was pretty sure that my plan of purchasing 6 senders and 8 receivers would help me to set up a system in our home. So I ordered the door bell senders with one lanyard emergency button with receiver. They have different combinations of buttons and senders.
I received an incomplete order. I received 4 door bell buttons and 4 receivers along with an emergency button on a lanyard and a receiver. That was only part of the order. I still had 4 receivers and 2 buttons to complete the order. So, I contacted the company and said that my order was incomplete. They were able to complete my order immediately if I would accept the oval shaped button. I said I would. (I really prefer the regular door bell button - but the oval button is OK.) The doorbell button can easily be taped to a table top with scotch tape. It prevents it from sliding off of the table and onto the floor or into a waste basket by mistake.
With multiple buttons and receivers, I had to pair up every button to every receiver with the same signal. I picked a common chime. There are about 50 to choose from.
When you purchase a set, the button and receiver are already paired. The instructions for pairing is relatively easy. It just takes some thought and time. When my wife needs assistance, every receiver in our home chimes at the same time.
There are no wires to connect.
Easy installation, but with 3 in the building, they seem to ring at the wrong doors. Still adjusting them.