All you need is the Kangaroo App & Wi-Fi. Chime is included! Install in minutes! No hard-wiring or hassles! Motion Alerts - Image Capture - Extended Battery Life - Simple Set-Up In the Box: 1 Doorbell Camera - 1 Chime - 1 User Manual and above all else: Peace of Mind! You can’t beat this price for 2 of them!! 1 for the front & 1 for the back or 1 for inside! Imagine the peace of mind you will always have - especially on those extended trips!