4TB HDD Large-Capacity Local Storage. Built-in 4TB mass storage space for 24/7 video recording, enabling you to save and replay the motion-triggered videos locally. 265+ algorithm to realize the higher efficiency than H. 264, getting smooth video and reduce up to 50% storage space and bandwidth. Playback the Crucial Moments. When you need to playback a video, you can easily find the corresponding key video clip by date search or motion event anytime anywhere. Accurate Real-Time Motion Alerts. Remote Access with Ease. Easily enjoy live streaming, replay key moments and more by downloading the free ZOSI Smart App or AVSS client to keep an eye on your home or business. Focus on the Key Areas. You will only receive alerts from the key area that matter and easy to adjust the sensitivity for detection and customize your privacy zone.