Purchased over 20 years ago, still unused and unopened. Since it hasn't been opened, it's unknown if it works. This is a multi-function digital thermometer, capable of measuring from -50°C to 70°C. - Model Name: Multi Water Thermometer - Temperature Range: -50°C to 70°C - Accuracy: ±0.1°C - Batteries Used: 1 AAA battery - Size: 15 x 8 x 5 cm - Weight: 48g - Sensor Length: 100cm Thank you for viewing. ・Please understand that this is a used item before purchasing. ・Please check the condition of the item in the photos. ・Please refrain from purchasing if you are sensitive to imperfections. ・No returns or exchanges (NCNR).