Klein Tools ET10 is a digital thermometer that takes ambient and direct-contact readings in both Fahrenheit (°F) and Celsius (°C) scales.The rugged, portable design with magnet makes it a practical choice of HVAC field service teams. Magnet inside base of probe attaches easily to air vents. The protective sheath cleverly serves as a handle to extend reach. Range -40°F to 572°F (-40°C to 300°C) Display DigitalWeight 1.50 oz (42.5 g) Batteries 2 x LR44 Overall Width 1.25" (3.2 cm) Response Time 3 Seconds Accuracy -40 to -20 Deg C +/- 2 Deg C; 19 to 150 Deg C +/- 1.5 Deg C; Above +/- 3 Deg C Special Features Magnet to Hold Onto Air Vents; Max/Min, Hold, and Average Functions Material Stainless Steel Probe; FDA GRAS Compliant Overall Length 6.5" (16.5 cm) Type Magnetic Digital Thermometer Overall Height 0.97" (2.5 cm) Application Ambient Air and Direct-Contact Temperature Included Batteries Style_Name Magnetic Digital Battery Type Lithium