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The outdoor sensor is 1.8 meter long thin wire. It can easily set through a window frame to measure outdoor condition. Great to make sure you set your air conditioner to a comfortable temperature. Also ideal for science projects or terrariums.

Specifications:
Large LCD display simultaneously showing indoor & outdoor temperature + indoor humidity
Recording MAX/MIN temperature and humidity value automatically
Selectable temperature unit: °C or °F
With back stand and hanging hole

Temperature Range:  
Indoor: 14.0 to 122.0 °F / -10.0 to 50.0 °C   
Outdoor: -58.0 to 158.0 °F / -50.0 to 70.0 °C
Resolution: 0.1 °C / 0.1 °F
Accuracy: +/- 2°F or +/- 1.0°C
Humidity Range: 20% to 99% +/- 5% relative humidity
Accuracy: +/-5% (for the 40 - 80% range)
Memory: min/max for indoor and outdoor temperature
Dimensions: 110 x 58 x 18mm
Clear display for easy reading
Weight: approx 108g
Battery: 1 x 1.5 Volt AAA (included)