【8CH Expandable All-in-one Camera System】This WiFi Security Camera System with 12.5" LCD Monitor for you easily to live view. The WiFi cameras and NVR monitor are auto-paired during the factory setting. The WiFi cameras and NVR Monitor need to be connected to a power source. This is an expandable security camera system, You can add more 4pcs cameras, it only Support ZOSI WiFi Cameras(ZG3023A). | 【Smart Motion Detection & Instant Alerts】This smart camera is alert and ready to react to any potential danger via a smart light & sound siren when it triggered by human motion events or controlled manually, it can help you keep troubles away. | 【Two-way Audio & Remote Access】Built-in mic and speaker let you stay in touch with your household. Check in with the family or tell your dog to stop barking, or say hello through the Zosi Smart App. And you can live view and playback anywhere anytime. | 【24/7 Recording with 1TB Hard Drive】Built-in 1TB Security Grade Hard Drive, Users are provided reliable 24/7 recording. It support long continuous recording and backup. The surveillance NVR can be set to auto overwrite the oldest internally stored footage or you can transfer those video files by USB to a memory stick or external Hard Drive. | 【Noted】The plug-in WiFi cameras and the NVR require the power connection. They are not Battery Cameras. The wired security cameras connect wirelessly to the NVR monitor(Only supports 2.4GHz WiFi). But they are designed for continuous recording, which requires them to be plugged in to a power source. Additionally, the NVR requird an Ethernet cable connect to router.