Wholesale LCD Thermostat Digital 433MHz Wireless 8 Channel Indoor/Outdoor Thermo Hygrometer + Three Remote Sensors Thermometer Hygrometer From Dejx, $130.29 | DHgate.Com
Bresser | BRESSER 8 Channel Thermo-/Hygro-Sensor | Expand Your Horizon
Bresser Remote sensor for weather stations
Temperature/Humidity Transmitter | TFA Dostmann
Thermometer and hygrometer 433 MHz | Telldus
Oregon Scientific THGR268; Wireless Temperature & Humidity Sensor, RF transmission Frequency : 433 MHz; Number of channels : 3; RF transmission Range : maximum 30 meters; Temperature sensing cycle : around 40 seconds (THGR268 TH-GR268 THGR-268 THG-R2