Xiaomi Smart Camera 4 launched at 249 yuan ($34) with 4K, 8MP sensor, AI tracking, Wi-Fi 6, 360° rotation, and local ...

Each Duo 3 lens boasts a 4K video resolution, giving the camera a massive resolution (7,680x2,160). It's essentially two side-by-side 4K videos -- a big jump over the Reolink Duo 2 WiFi.