【REAL-TIME TWO-WAY AUDIO & REMOTE VIDEO TALK】: It has a built-in microphone and speaker, enabling real-time and clear two-way audio communication with visitors. You can hear and talk to them from anywhere using your mobile device. 【HD RESOLUTION & WIDE-ANGLE LENS】: The camera provides clear images and video calls with its HD resolution. It also has a 100° wide-angle lens, offering a broader view to enhance home security. 【INSTANT NOTIFICATION & IR NIGHT VISION】: When someone rings the doorbell, the camera automatically takes photos and sends push notifications to your mobile phone. You can communicate with visitors through video calls or voice calls on the app. Additionally, the camera has IR LED lights for night vision, allowing clear visibility outside the door in low-light situations. 【RECHARGEABLE BATTERY & WIRELESS DESIGN】: The doorbell is powered by a built-in 800mAh li-ion rechargeable battery, providing long standby time. It connects to your 2.4GHz WiFi network and can work for approximately 6 months on a full charge. It is a wireless design, eliminating the need for existing or additional doorbell wires. 【CLOUD STORAGE & EASY INSTALLATION】: The doorbell supports encrypted cloud storage, offering 3 days of rolling storage for free. You can access doorbell records and photos at any time. The installation process is easy and can be completed within 5 minutes using the provided screws or 3M double-sided tape.