VIVOTEK?s CD8371-HNVF2/HNTV is a vandal-proof network camera specifically designed for prisons and correctional facilities. With up to 20 fps at 3-Megapixel resolution, 940nm IR illuminators, two-way audio, and available in either fixed lens (-HNVF2) or vari-focal (-HNTV), the CD8371-HNVF2/ HNTV is the most feature rich prison cell surveillance camera available today. The CD8371-HNVF2/HNTV has an anti-ligature design to limit the possibilities of self inflicted harm or suicide, a required feature for environments like prisons, holding cells, psychiatric wards, mental hospitals, and correctional institutions.