A few uses of the infrared thermometer include : - Check thermostats - Heat loss through insulation - Energy leaks through windows - Temperature of pool or spa - Monitor grilling / BBQ temperature - Check temperature of aquariums Product Specifications : - Measurement Range: -30° to +270°C - Response Time: Less than one second - Resolution: 1°C - Basic Accuracy: +/- 2.5% of reading or +2°C - Optical Resolution: 6:1 - Emissivity: Fixed at 0.95 - Battery: 2 x 1.5v AAA Batteries - Order Code: DIR-77L