Original Xiaomi Mijia Smart Video Doorbell 2 AI Face Identification Infrared Night Vision Two-Way Intercom Motion Detection SMS Push 139 NOTE: This product is the original product of Xiaomi Mijia. You need to modify the server area to China in Mijia APP before use. In case of network delay, it is a normal phenomenon. Please pay attention before buying! Advantage: gt; Real-time detection of abnormal conditions outside the door; gt; The longest detection distance reaches 5m gt; Support two-way intercom between host and guest, support voice change, girls living alone are not afraid gt; Larger HD wide angle, larger and clearer,139 degree wide angle, 2 million pixels, 1080P resolution gt; High-definition infrared night vision mode, you can see clearly at night gt; 4.5 months battery life in standard mode gt; Can be linked with other Xiaomi products gt; Simple 3 steps, easy configuration, gt; 4 LR6 AA Batteries (Not Included For Air Safety) Name : Xiaomi Smart Video Doorbell 2 Model : MJML02-FJ Battery Type : AA LR6 1.5V Rated Input : 4.5V/0.2A Resolution : 1920x1080 Lens Angle : 139° Night Vision Light : 4 x 850nm IR LEDs Intercom Function : Support Storage Function : Cloud Storage Connection Protocol : WIFI IEEE 802.11b/g/n 2.4GHz, RF433NHz Operating Temperature: 0℃-45℃ Operating Humidity : 10%-90%RH, non-condensing Storage Temperature : lt;30℃ Compression : H.265 Video Frame Rate : 20FPS Support System : Android4.3 Or iOS9.0 and Above Name : Doorbell Receiver Model : MJJSQ02-FJ Rated Input : 100-240V~, 50-60Hz, 0.03A Connection Protocol : RF 433MHz Operating Temperature : 0℃-45℃ Operating Humidity : 10%-90%RH, non-condensing