A:Answer So the Ring Doorbell has motion sensor detection and of course the doorbell notification. In a busy hallway, you will want to deactivate the motion sensor so that you do not always get notified. If you have it linked to your computer only, then it will record for 15-30 seconds the time of ringing if you do not answer. You won’t know someone is there until you get to your computer until you link it to your phone or another Wifi enabled device. The doorbell works off Wifi, so if you have a Wifi enabled device with you that is linked to the doorbell, you can be notified that way. The Ring doorbell has a built in rechargeable battery. I would recommend the Ring 2 if you plan on always charging it as oppose to hard wiring it. Hope that helps