ZOSI C303 Spotlight Home Security Cameras System with Audio,8CH 5MP Lite DVR with 1TB HDD,4 x 1080p Outdoor Cameras,Color Night Vision,Person Vehicle Detection,Light&Siren Alarm,for 24/7 Recording Precisely Detect Person Vehicle,The camera is smart enough to detect people or vehicles from other objects and safely reduce unwanted notifications.you will receive instant App push notifications,email alerts and sound alarms (siren) when motion events are detected. When triggered by human motion events or manually controlled, this camera will react to any potential danger with a smart light and sound alarm system to keep troubles away. Built-in brilliant white lights and high-pitched siren provide double insurance and keep you protected even when you are asleep. With built-in microphone in the camera It can support a one-way audio, you can hear the other party talking, but not the conversation.This Camera can be installed in almost any outdoor or indoor place. Up to 80ft night vision, 1080P HD and 90°wide field of vision, providing you a clearer visual quality & smoother live viewing experience. With the advanced H. 265 technology, which could double the data compression ratio, keep the high quality video even with low bit-rate, it allows you to maximize storage space and enjoy ultra-long recording.Support ultra-long continuous recording and backup by USB. DVR can be set to automatically overwrite the oldest internally stored footage or you can transfer those video files by USB to a memory stick or external hard Drive. The free app ZOSI Smart lets you see all of your cameras in one place. Check in on your home or business wherever you have an internet connection. Free App for Live View & Playback on Smart Devices with WiFi or 2G/3G/4G anywhere anytime. And you can choose the date and time you want to play back on the timeline so you don't miss any important moments.