Quantity: One piece Color: Silver Product Size: As shown in the picture Product Feature Overview: 1: Easy mobile app setup, one-handed operation. 2: 720P HD wide-angle lens. 3: Long standby time (3-6 months, depending on battery capacity). 4: Two-way call, one-way video, identifies the caller. 5: Human body induction; when someone stays, the host wakes up and sends a message. 6: Infrared night vision; night is as bright as day to identify visitors. 7: Recording, motion detection recording, doorbell button to start recording, APP preview recording, voice recording of visitor behavior. 8: Supports multiple languages, tracks mobile phone language system changes. Factory settings are all in English. The default language is English. 9: Supports 8 mobile phones to connect to the doorbell and 3 mobile phones to watch simultaneously. 10: Supports cloud storage. 11: Charging mode: DC 5V-1A, AC 8-16V. You can watch it anytime, anywhere, whether traveling, working, or on a business trip, by opening the mobile app. Understand all activity at your door. Smart Wi-Fi configuration. Long-distance signal transmission; no need to open the door to get visitor information. Supports multiple devices online simultaneously, allowing you to view anytime with a quick response. Integrated installation technology. The transmitter uses screwless mounting technology and ultra-low power wireless technology. Solves the problem of frequent battery replacement for traditional doorbells. Good quality product.