http://www.foshk.com/Wifi_Weather_Station/WH2650.html
I have the feeling that this device share the protocol with the excellent EcoWitt G1000.
Supported Sensors:
Up to 4 WH45 Indoor CO2 PM2.5 PM10 Temperature and Humidity 5-in-1 Air Quality Sensor
$ 159.99
Up to 4 WH43 PM2.5 Air Quality Sensor for Indoor Use
$ 59.99
Up to 4 WH41 PM2.5 Air Quality Sensor Monitor Outdoor
$ 59.99
1 WH32 outdoor temperature and humidity sensor
1 WH40 self-emptying rain gauge sensor
1 WS68 wireless anemometer
1 WH57 lightning sensor
(often bundled in a single Weather station)
Up to 8 WH31 multi-channel temperature and humidity sensors
Up to 8 WH51 soil moisture sensors
Up to 4 WH55 Water leak sensors
Up to 8 WN34 Temp Sensors
Soil moisture sensor (WH31SM)
Lightning detector (WH31L),
Leak Detector (WH31La),
Probed thermometer (WH31P)