The Link2Home Wireless Smart Battery Doorbell features a built-in battery that lasts up to 3 months, rechargeable via USB, with an option for a permanent power supply. It provides instant alerts upon doorbell press or motion detection and can connect to the Link2Home Bell Chime for indoor alerts. The doorbell offers a secure 128-bit SSL connection and 2-way audio via the Link2Home Pro app. It streams in full HD (1080p) with a 145° wide-angle view, zoom, and night vision capabilities. Receive activity alerts with snapshots and record video clips using a MicroSD card or cloud service. Its weatherproof (IP54 rated) casing ensures durability in all conditions. Compatible with Smart Home devices for voice commands, it's easy to install without a hub. The Link2Home Pro app allows for automation features. It supports MicroSD cards up to 128GB for video storage or a cloud service for continuous recording. System Requirements: Wi-Fi connection, Android 4.1 or later, iOS 8 or later, Link2Home Pro account (Free).