This battery-powered video doorbell ditches complex wiring with its built-in 4,600 mAh rechargeable lithium battery, offering up to 90 days of standby time with smart power-saving functionality. Save videos to a Micro SD Card (up to 512G, sold separately) or subscribe to EZVIZ CloudPlay with a free trial. Receive instant notifications and engage in two-way talk when a visitor presses the doorbell, with real-time video calls to your phone. Please note, this camera only supports 2.4G Wi-Fi. It features Smart PIR Motion Detection, sending mobile alerts for front-door visitors with customizable detection sensitivity levels. Capture all front-door activities in 1080P FHD resolution with a 155° ultra-wide-angle lens and 5-meter night vision, automatically shifting between day and night modes. The large 4.3-inch indoor color screen aids elderly users and children in seeing visitors clearly. The exterior camera has an anti-prying design for tamperproof security, and all data transmission is end-to-end encrypted for privacy protection. Weight: 0.66579603124 pounds.