Digi 301-1141-01 Watchport Temperature & Humidity Sensor Type: Temperature & Humidity Sensor Specifications: Temperature Accuracy: +/-2% at -40 degree F (-40 degree C) to 14 degree F (-10 degree C) Humidity Accuracy: +/-5% at 0 to 90% Non-condensing Sensing Rate: 20 per Second Interfaces: USB 2.0