... and many function3) Built-in high-quality IR lens, adopt imported IR LED, effective IR distance is 40-50m4) Widely used in ... a proffessional manufacture of surveillance equipment such as: cctv camera, IP camera, DVR card,stand alone DVR and related surveillance peripherals ... every one of our customers. Installation Steps: Collect cctv camera with dvr via video+power cable;Collect dvr with monitor ...