Remotely monitors sensors 24/7 using a APP. Perfect for...Backyard temperature and humidity; Plants, gardens and greenhouses; Refrigerators, freezers; Food storage; Sensitive electronics; Outdoor pets and livestock; and so much more;Temperature and humidity measures: (1) Ambient air temperature; (2) Ambient humidity; (3) Probe temperature, Temperature range: -40F to 140F;Includes: sensor, internet gateway with LAN cable & AC adapter, DRY probe;Requires 2 AAA Alkaline batteries (not included);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.