Tomfoto LCD Digital 433MHz Wireless 8-Channel Indoor/Outdoor Thermo-hygrometer with Three Remote Sensors Thermometer Hygrometer Comfort Level Alarm Function - Walmart.com
Digi-Sense Traceable Wireless Thermometer and Humidity Set with Calibration; 1 Remote Module - 94460-84
3 Channel Wireless Weather Station with Barometer – Taylor USA