The Aqara G4 is a unique video doorbell that can be wired or battery powered. It is also the first battery-powered option that works with Apple's HomeKit Secure Video and supports streaming to Google and Alexa smart displays, with local AI used for facial recognition alerts, automations and more. Local AI face recognition: the built-in local face algorithm is the biggest advantage of the Aqara Doorbell. It can help people quickly recognise the identity of the person at the door by noting the name of the specified face and sending a push notification through the app or setting various automations based on the specific person. Even if the network connection is ever interrupted, the detection function is not affected. Works with Apple Home etc.: This is the world's first battery-powered HomeKit Secure Video doorbell. Security with HomeKit Secure Video. Video analytics and notifications happen on your Apple devices, like iPad, phone, Apple TV. Everything is encrypted before being stored in Apple's iCloud. Moreover, it can realise the connection of audio and video with Google and Alexa and connect with Yandex Smart Home app to achieve automation.