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No batteries are required<br>·Operates from 24VAC, or from 2 size “AA” alkaline batteries<br>·Optional temperature display of Fahrenheit or Celsius scale<br>·Air Filter change Indicator<br>·Low Battery Indicator.<br>·Display temperature calibration<br>·Separate 5 day (weekday) and 2 day (weekend) programming with four separate time/temperature periods per day<br>·Intelligent Recovery Option for optimizing comfort<br/><p><b>Package include:</b><p><br/>Saswell T21STK-2 Thermostat<br>(Jumper wire connected)<br>Two screws and anchors<br>User manual<p><b>Service and Support</b><br>All products come back by a 30-day guarantee,1 Year warranty and lifetime support.<p><b>IMPORTANT SAFETY INFORMATION</b><p>Always turn off power at the main power source by removing the fuse, or switching the circuit breaker to the off position before installing, removing, cleaning, or servicing this thermostat.<p>Read all of the information in this manual before installing this thermostat.<p>Use a professional contractor to install this thermostat.<p>This is a 24VAC low-voltage thermostat. 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No batteries are required<br>·Operates from 24VAC, or from 2 size “AA” alkaline batteries<br>·Optional temperature display of Fahrenheit or Celsius scale<br>·Air Filter change Indicator<br>·Low Battery Indicator.<br>·Display temperature calibration<br>·Separate 5 day (weekday) and 2 day (weekend) programming with four separate time/temperature periods per day<br>·Intelligent Recovery Option for optimizing comfort<br/><p><b>Package include:</b><p><br/>Saswell T21STK-2 Thermostat<br>(Jumper wire connected)<br>Two screws and anchors<br>User manual<p><b>Service and Support</b><br>All products come back by a 30-day guarantee,1 Year warranty and lifetime support.<p><b>IMPORTANT SAFETY INFORMATION</b><p>Always turn off power at the main power source by removing the fuse, or switching the circuit breaker to the off position before installing, removing, cleaning, or servicing this thermostat.<p>Read all of the information in this manual before installing this thermostat.<p>Use a professional contractor to install this thermostat.<p>This is a 24VAC low-voltage thermostat. 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