First of all, you need EZVIZ home security or surveillance equipment. If you want to record camera feed, you also need to insert MicroSD card into MicroSD card slot. Next step is to connect EZVIZ device with power source (using USB adapter) and download EZVIZ app into your smartphone. To connect EZVIZ device with smartphone, you need to scan EZVIZ device QR code with your smartphone EZVIZ app. Next you need to follow onscreen instructions to monitor and record camera feed.