This is a durable brewing thermometer, suitable for extract and all-grain brewers. Five-inch heat-resistant stainless steel probe and digital quartz display; reads in Celsius or Fahrenheit, with a range of -4°F to 400°F (-20°C to 200°C) and a typical response time of 1.5 seconds. Completely submersible, dishwasher-safe and waterproof (although the LCD display needs to be kept away from extreme/direct heat or cold). Max memory and hold features will read back the highest or exact temperatures last measured - handy for finding hot spots in a mash or taking a reading on high-up sparge water tank. This thermometer can be calibrated in an ice-water solution and has a resolution of .1° and an accuracy within 2°. Also features an anti-microbial coating. Runs on one LR-44 button cell battery (included).