About this item [Smart PIR Motion Detection] The video doorbell includes a built-in PIR motion detector which can detect the slightest movement in front of the door. You can check the situation outside the door on your phone anytime, anywhere to achieve the purpose of real-time monitoring. [Two Way Audio] The wireless doorbell camera supports talking to the person who rings the doorbell in real-time from mobile App on your smartphone or tablet from anywhere. [Power-on Guarantee] The WiFi Video Doorbell Camera requires wired power and may utilize your existing doorbell wiring (16V-24V). No need to remove to charge, protect your home all the time. In addition, the doorbell is also equipped with two rechargeable batteries which can work regularly up to 4 months. [Night Vision] The doorbell camera can switch automatically and is clearly visible at both day and night with IR-cut to keep your home and family safe. [Local Storage] The wireless video doorbell contains removable 16G TF card, whose maximum storage capacity can reach 64G. You will never miss out on a moment with the local storage function.