Features: 1.App Control: Through mobile App, you can remotely control and monitor the doorbell anytime and anywhere, and check the condition of the door at any time. 2.Building Intercom: Compatible with building intercom system, easy to interact with other building equipment and achieve remote call function. 3.Hd Image: The doorebell camera provides a clear picture, allowing you to clearly identify visitors and monitor the situation at your door in real time. 4.Waterproof: Outdoor video doorbell is designed to be waterproof, able to work well even in adverse weather conditions, without weather restrictions. 5.Home Security: Built in security systems, the doorbell cameras protect your home and property from potential threats. Simple installation without complicated wiring. Specification: Item Type: Doorbell Camera Material: Plastic Battery Type: Lithium Battery (Shipped without batteries) Battery Model: 18650 Battery Quantity: 2 Supply Voltage: 3.7v PackageList: 1 x Doorbell 1 x Indoor Ding Dong Machine 1 x Paste 4 x Screw 4 x Accessories 1 x Instructions