Remotely monitor sensors 24/7 using a web browser*. Measure temperature & humidity for wet locations: aquarium water tanks?? terrarium environments?? hot tub spas?? swimming pools?? greenhouses?? outdoor pets and livestock?? and so much more.</br>Temperature and humidity measures: (1) Ambient air temperature; (2) Ambient humidity; (3) Probe temperature</br>Temperature range: -40??F to 140??F</br>Includes: sensor?? internet gateway with LAN cable & AC adapter?? WET probe</br>Requires 2 AAA Alkaline batteries (not included)</br>Text and E-mail Alerts first 3 months FREE; 1 year subscription available after for $11.88 yearly ($0.99 per month)?? kindly refer the user manual given below for troubleshooting steps.</br></br>Product Description</br></br>The La Crosse Alerts?? Monitor and Alert System by La Crosse Technology?? is easy to use?? flexible and extremely affordable for its versatile functionality. Custom text and e-mail alerts notify customers when the temperature or humidity exceeds their desired range?? when  the battery is low?? or when the connection is lost*. Add up to 5 sensors to remotely monitor in a wide variet