Feature:PIR motion detection When someone rings the doorbell, your phone will get instant notification. You can open the door remotely via the app and communicate directly via your mobile phone. The video doorbell has a passive infrared sensor built into it that can pick up the slightest movement. Real-time monitoring is possible. Watch videos from your phone anytime, anywhere, and don't mind the danger of opening the wrong door or the embarrassment of leaving visitors waiting when no one is home. HD video and two-way audio make your communication clearer. Family real-time sharing 4 mobile phones can monitor and share doorbell images at the same time, but only one user can talk directly on the walkie-talkie. Compatible with iOS and Android operating systems.Description:Product name: WiFi DoorbellCommodity type: WIFI doorbellResolution: 1280x720Field of view: 166°Infrared light: 6x850mmWireless network: IEEE 802 11 b/g/nAudio: Two-way talk with noise cancellationBattery: 3 x 18650 specification batteries (total capacity 6800mAh, can work normally for 6 months.) (not included)Monitoring: device buttons, motion detection, remote live viewNotification function: push notification within 1 secondDevice wake up: within 600msPower consumption: standby power consumption 200μA, working 170mAPacking list:1 x WiFi doorbell4 x screw4 x mounting accessories1 x wrench1 x sticker1 x user manual1 x packing boxNote:1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding.2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.