-20°C to 70°C (Air) 0°C to 50°C (Water) Temperature Measurement Range 1 Year User-Replaceable Coin Cell Lithium Battery Waterproof Housing for Use in Outdoor or Condensing Environments Up to 30 Meters (100 ft) High and Low Alarm LED Indicators Stores up to 52,000 Recorded Readings Before Download of Data Needed