- Instantly receive alerts upon detecting any movement near your door - Live View & Two-Way Talk, Get real-time video and high-quality two-way talk with noise cancellation - Mobile App Notifications, Keep updated on any doorbell activity with instant mobile app notifications - Chargeable Battery (Use micro USB to charge), Reliable performance providing up to two months of uninterrupted power - Night Vision, Day and night mode can be switched automatically. The image is clearly and visible for your safety and family security no matter its day or night - Smart WiFi configuration (Supports 2.4GHz and 5Ghz Dual-band Wi-Fi Connection), Long distance signal transmission, no need to open the door to know the visiting information. It can support multiple users to watch online at the same time - FREE Lifetime 24/7 Technical Support, Delivery and Installation