This boxed set contains all the equipment needed for an app-enabled entry security system. A call from the video doorbell rings the on-site monitor and up to eight smartphones or tablets. After answering the call, you can see and speak with your visitor then easily unlock the door with the touchscreen monitor or using the slider button on the app. Our unique hardwired monitor ensures calls can be answered even when the internet is down or slow and the mobile app ensures you stay connected when you're on the go. The monitor features built-in memory that can be manually activated to record video from the doorbell or set to automatically record all calls. Expand storage using the MicroSD card slot and view recorded calls on both the monitor and the app. All this security and convenience is backed by Aiphone's quality and award-winning customer support. Our commitment to your satisfaction is equivalent to our commitment to supplying quality products. Second to none.