These intercoms work great and are very easy to set up. One quit working at nine months. The owner's manual gives an email address for support, but my email was returned undeliverable. However, i did find them on Facebook. They responded very quickly to my FB message and sent out a replacement intercom right away.Hard to push side buttonThey just workSo far so good. We have 15 classrooms and an intercom in each classroom. So far it works really well. Customer Service has also been a big help. They are easy to get ahold of with any questions and respond right away.With gamers in the house, and a busy schedule, this has saved a lot of yelling in our house and helped to keep the peace. Easy to use. Set up is a breeze. There is a built-in belt clip, this model has an approximate 1 mile radius making it easy for me to get help out in the garden without stopping what I am doing. This would be great in a large office, or to use in a home office. The battery life lasts all day, and the sound quality is great as long as you are at least not in the same room. It looks and feels like a phone and doesn't take up much space at all. With several medical issues, this has given me and my family peace of mind and some independence and a bit more privacy. You cannot monitor someone else with this, just communicate.These are actually cooler than I expected. The sound is great and there’s multiple different channels. I also like how you can monitor the other intercoms if you want to. Probably will end up buying one more for the kitchen.Enjoying not yelling to my daughter from other parts of the house to ask questions. As I work from home I canquickly contact her in the morning to check if she is up and getting ready for school. Yes we have mobile phones but it's easier to use the intercoms for quick chats. The range is good and they are light weight-I clip one on my pants when I go outside to water. We are enjoying using them and I suggest friends purchase them for their homes.I initially rated this item poorly because I did not read the instructions correctly. The company contacted me and clarified the instructions and the intercom works great! You will be pleased with this set!!