ANNKE Professional POE 8CH 6.0MP NVR Recorder with 1TB Surveillance Hard Disk Drive Pre-installed and (4) 4.0MP 2688x1520p CCTV Weaterproof Network IP Cameras, 100ft Super Night Vison H.264+ video compression, save bandwidth for 70% than normal H.264; VCA (Video Content Analysis) for smart crossing line detection and region invasion detection Scan QR-code for free viewing App (CCTV viewer) on smartphone or tablet Remote viewing on PC via website or installing PC client (iVMS-4200); NVR supports Hikvison & Dahua ONVIF network camera Advanced WDR and 3D DNR technology for smooth and vibrant video; Smart search helps you detect motion in a selected area easily for intelligent playback. ROI (Region Of Interest) function of camera: decrease a non-ROIs image quality to save bandwidth and storage while images in ROIs remains crystal clear; Zero channel for easy multi-channel remote live viewing to save bandwidth