The 2KHD Smart Wireless Camera Doorbell is a high-quality video doorbell that is powered by a 1000 mAh battery with a working time of 2-4 months. It features a wide viewing angle of 125° and night vision capabilities for added security. The doorbell is compatible with Alexa and can be used with the Tuya app on Android 4.3 or iOS 9.0 or above devices. With its motion-activated features, adjustable volume, and water-resistant design, this smart doorbell is an essential addition to any home for added convenience and safety.