Features 1、Clear Picture Quality: The smart doorbell has a built in HD camera, which brings you clear and crisp picture quality and lets you know what's going on near the door at all times. 2、Wireless Connectivity: Smart Doorbell uses wireless connectivity so you don't have to worry about power and wiring to be connected at any time. 3、4.3in Screen: The smart doorbell is also equipped with a 4.3in high definition LCD screen, giving you a clearer view of your visitors. 4、Visual Intercom: The intelligent doorbell supports visual intercom function, allowing you to communicate with visitors through voice, avoiding the risk of opening the door directly to strangers. 5、Multi Level Security: Smart doorbell has multi level security, including remote notification, multiple simultaneous viewing, intelligent detection and other features to make your home more secure and reliable. Specifications Item Type: Intelligent Doorbell Weight: 579g / 20.42oz Product Material: ABS Battery Type: Built in lithium battery (shipped with built in lithium battery) Battery Model: 105568 Battery Capacity: 5000 mAh Smart Doorbell Size: Approx. 14x9.3x2cm / 5.5x3.7x0.8in Camera Diameter: Approx. 7cm / 2.76in Camera Thickness: Approx. 6cm / 2.36in Package List 1 x Smart Doorbell 1 x Camera 1 x Mounting Plate 6 x Screws 1 x USB Cable 1 x English Manual 1 x Card Picker