Video doorbell Lechange by Dahua for outdoors with autosupplied WiFi by batteries. PIR detector incorporated of 5m. 1/2,9" CMOS of 2MP@20 fps. IR illumination of 5m. 1,9 mm lens (140°). 2 way audio (built in microphone). MicroSD slot. Micro USB (battery charge). reset button/WPS. IP65.