I don’t recommend you buy this arlo. It will sense motion and you can control it. No it doesn’t sense sound. This device is easy to install but it’s a hassle to change the batteries every 2 months. No it’s a lie it won’t record 7 days , it will only record 10 seconds of motion but you can always watch you things live anytime and it’s NOT BEING RECORDED UNLESS THERES A MOTION. If you want so real stuff get your self yi home instead.