This is exactly what I was looking for. My kids tend to lose their keys all the time at school and this just works out perfectly for me. I did have a difficult time hooking it up so I decided to wait on my husband since he great at these type of things. He was able to get it going in about 25 to 30 minutes including all the downloads to my an his phone. Its definitely an elegant feature to our door I must say I keep getting ask about it daily. So far its been up for about 2weeks an the weather is. Cold here in Kentucky an I nor my kids have had any issues with it.