This is not your traditional doorbell. When someone rings the bell, you get a notification on your smartphone and you can view who is outside your door and have a conversation with them before letting them in.We provide free installation.Can record video with your mobile phone. Two way audio Night vision 166 wide angle camera lens Long battery life PIR motion detector notificatIon push to mobile device Brand No Brand SKU 100844522_NP-1021366624