Product Specifications Name: Xiaomi Smart Doorbell 3SProduct Model: MJML07-FJExternal Dimensions: 146 × 52 × 29mmIP Rating: IP65Battery Capacity: 5200mAh (typ)Rated Input5V?2A (Type-C port); 8-24VAC, 10-40VA, 50–60Hz (doorbell AC transformer)Wireless Connectivity Wi-Fi IEEE 802.11b/g/n 2.4GHz, RF 433MHzInfrared Light 940 nm infrared lightAudio System Two-way voice...