The Extech 392050 is a Penetration Stem Dial Thermometer that has a temperature range of -50°C to 150°C (-58°F to 302°F) and an accuracy of ± 1°C (2°F). Ideal for use in liquids, semi-solids, and solids. It features a 12.7 cm (5 in) stainless steel shaft with a 5 cm (2 in) dial, an on/off switch, and suto power off after one hour. Meter includes 1.5 V battery button and protective plastic sheath with pocket clip.