It was easy to link to the main unit once I realized I needed a paper clip or thin nail to press the link button. Works great for my son who lives alone and is deaf. Plan to add more Blink units when he can afford them.

The pros are great as I discovered via the instructions that came in the box. I called the office number for help when they were n't working. The lady that answered named Jennifer worked with me and I got it working. I fell in love with it. Then, I discovered that I can use three transmitters in different rooms and use the same blink in all three of them. I just bring the blink with me to whichever room I go. To be honest, the cons for me were the tiny batteries being so hard for me to handle and connect the links between the door bell and the blink within ten seconds. I have mild cerebral palsy. But, in spite of that, I love the system.

I love it. I can use it anywhere. It works much better than old Sonic Alert system. It still work if power is out like radio. Also it let me know if it is door, phone and fire alarm.

I'm very happy with the Blink receiver now that Diglo helped me out with the warranty communications problem I had. It's working perfectly and the doorbell is too. Thank you Diglo!!!