XiaoMi IMILAB EC4
Outdoor Spotlight Battery Camera Video Surveillance System Kit
2.5K IP Wireless WiFi Smart Home CCTV Security
Imilab EC4 camera must be connected to the gateway(hub) to use normally. In the international version, One gateway(Hub) can connect up to 4 cameras.
Buying a camera + gateway(Hub) can save you a lot of money.