WiFi, Movement detecting. Intrusion alarm systemAPP Function supports multi-device connection Android, IOS, WindowsReal-time video and audio chat with visitorPicture snapping and video recording functionNight vision and built-in IR-CUT technology, available day and night3x18650 batteries and 32 GB SD card are included. (You do not need to buy any extra accessories ).Wireless Doorbell, no wires or cables are required. Just mount, download the APP, then sync it to your doorbell.Access 720P HD live video Day or Night,at any time from your cellphone.Equipped with PIR sensor, providing accurate motion detection so that you never miss a visitor.Video doorbell camera put the power of home property security in your hands. See, hear and speak to anyone at your door from your smartphone.Mount and set up your smart doorbell in just minutes with our included tool kit and easily connect with your wifiSpecifications: Item type: WIFI Doorbell Resolution: 1280*720 Field of Angle View: 166 IR LED: 6*850mm Wi-Fi: IEEE 802 11 b/g/n Audio: Two-way talk with noise cancellation Recording: Device SD card recording(20 seconds) Storage 32G(Included) Battery: AC Input/3 x 18650 specification batteries (Included) Monitoring: Device Button, Motion Detection, Remote Live View Notification Function: Push Notifications within 1 second Device Wakeup: Within 600 ms Power Consumption: Power Consumption Standby 200A, Working 170mAPackage Include: 1 x WIFI Doorbell 4 x Screws 4 x Installing Accessories 1 x Wrench 1 x Sticker 1 x User Manual"