4-times the resolution of 1080p， the ultra HD 4K CMOS image sensor can capture more light， improve color， contrast and low-light performance， you are able to digitally zoom into far away objects without losing any quality

Simple plug and play: a single network cabling provides both video and power to your cameras， you no longer need to install security cameras to a power outlet， which is more stable and reliable than DVR system

Remote access and smart human detection， free app allows you to live view and playback on mobile phone anywhere anytime， the cameras are triggered by human motion， instant notifications and email alerts with screenshot will be pushed to your smartphone immediately

Smart light alert and audio recording: your ZOSI camera comes with motion-activated white LED warning lights， you can set turn on or turn off manually， built-in mic captures high-fidelity audio and offers you critical evidence

Built-in 4TB security grade hard drive provides reliable 24/7 recording， support ultra-long continuous recording， NVR can be set to automatically overwrite the oldest stored footage， you can also transfer video files to a memory stick or external hard drive

16CH 4K expandable camera system， you have the flexibility to extend additional cameras， you can add more 6-piece ZOSI 8MP，5MP or 2MP POE bullet or dome cameras