General Tools DT520TH Digital T-Handle Lab Thermometer with 8-Inch Probe The General Tools DT520TH Digital T-Handle Lab Thermometer, 8 Inch Stainless Steel Probe, -58 To 536 Degrees is a T-Handle lab ready thermometer Device has a Fahrenheit and Celsius toggle switch, on or off switch and data hold The auto power-off ensures that your battery is preserved Pocket clip keeps the thermometer in your shirt pocket or pants and always nearby Powered by one LR44 battery which is included