CDN is a company which specialises in the manufacture of thermometers and timers. This CDN Pocket Proaccurate® Insta-Read® Cooking Thermometer has the following features: Instrument Range: -18 to +103°C. NSF® approved. 1"/2.5 cm magnified dial. 5"/12.7 cm stem. Waterproof; shatterproof. For roasts, meat & poultry. Polycarbonate lens. Stainless steel housing. Recalibratable. Calibration tool on sheath. Sheath can be used as handle extension. Pocket clip.