1PC Smart Home Doorbell, Remote Monitoring, Clear Two-way Audio, Easy To Install wifi smart home doorbell remote monitoring intercom doorbell Product name: Doorbell Colour: Black material: plastic Package weight: 0.5 kg Product size: 29.3mm*12.8mm*56.5mm feature: * HD quality image with 166 wide-angle view: This doorbell includes a 1.7mm lens with 720p image and 166 wide-angle view. You can clearly see who your visitors are. * Support 2.4GHz Wi-Fi connection: This doorbell can be connected to your home Wi-Fi, so that your doorbell is always online. This way you can see and talk to your visitors anytime, anywhere. * Remote viewing: When the doorbell is pressed, an alert message will be sent to your mobile phone, and you can view real-time video and chat with visitors on your mobile phone anytime, anywhere. * Clear two-way audio: Two-way audio is clear, with echo cancellation and noise cancellation technology, allowing you to talk and hear clearly with visitors. * Support infrared night vision: This doorbell supports night vision through infrared technology, you can have a clear vision regardless of day or night. 24 hours monitoring, you will not miss any visitors. * Low power consumption: This doorbell requires three 18650 batteries (not included). The lithium battery has the characteristics of low power consumption and long battery life, and can be used for one to three months. * PIR motion detection: advanced PIR motion detection distance can reach 5 meters. Any suspicious actions will be detected and it will send an alert to your phone. We provide three adjustable sensitivity levels, they are low sensitivity, medium sensitivity and high sensitivity. You can change the sensitivity level as needed. * Easy to install: This video doorbell is wireless and requires no cables or wires. You only need to fix the bracket to the wall with mounting screws, install the battery, download the "Youbel" APP, and start using it. Scope of application: family business residential areas, office buildings, hospitals, restaurants, factories, etc. place.