This X-Sense STH54 thermometer hygrometer set is 30% off and comes in $6 below its 90-day Amazon average of $41. It includes 3 sensors plus a base station that can connect up to 10 sensors total. The app sends notifications when temperature or humidity leaves a range you set, and it works with Alexa. Shipping is free. Buy Now at Amazon
Features
Includes 3 sensors & 1 base station Base station supports up to 10 sensors Temperature accurate to ±0.36°F, humidity accurate to ±2% RH Operating range of -4°F to 140°F Alerts sent to the app when readings leave your preset range Past year of data can be exported as CSV for free
