... LCD, handsfree model2 Metal outdoor door station,pretty weatherproof and vandal proof3 3.6mm camera lenz. With long operating life LED ... calling, video intercom, unlock, monitor.7 With warning function, TWO AV input.8 Support AUTO switching from two additional CCTV camera.9 ... melody.Brightness, chroma and ring adjustableplease note : the out door station is optional,as well as "vandal-proof , water- ...