Features: 1.5G WIFI Connection: Support high speed 5G WiFi network connection, two way voice call, noise reduction, can wake up the device through the mobile phone within 1s. 2.Remote Monitoring: The doorbell can be connected to your existing doorbell wiring or paired with a sync module for real time viewing and two way audio communication. 3.PIR Detection: The Doorbell supports PIR detection, instantly sending alarm notifications to your smartphone when someone approaches your door, ensuring enhanced security. 4.Day And Night Vision: Featuring automatic day and night mode switching, the doorbell provides clear visibility with its million pixel HD camera and ultra thin 2.6mm wide angle lens. 5.Long Lasting Battery Life: The built in high capacity lithium battery ensures a durable battery life of 5?8 months, even without using a wired power source. specification:Item Type: Smart Video Doorbell Material: Plastic + Electronics Resolution: 1920x1080 Viewing Angle: 2.6mm at F2.0/155 degrees IR LED:6x850nm Wi-Fi: 802.11 b/g/n Memory Card: Up to 128GB (not included) Speaker: Built in 8/1W Battery: Indoor Answer Machine: 900mAHA battery x3 (built in) Video Doorbell: 5000mAh lithium battery (built in) PackageList: 1 x Video Doorbell 1 x IndoorAnswerMachine 1 x Sticker 1 x Doorbell Charging Cable 3 x Screw 3 x Plastic Expansion Tube 2 x Metal Clip 3 x AAABattery 1 x Instruction Manual