Amazing door bell, it alerts me on my phone anywhere I am, when someone rings or even doesn't ring and detects movement. I can talk 2 way with the person and ask their intensions. It also records every moments and save it for later to see in case I don't answer or see the motion detection alerts. I absolutely recommend it. No wires were needed just a bit of driling since we had brick. Great battery life and easy to dismount. A huge piece of mind when the deliveries come and your not home the whole day. I absolutely recommend this product.