The Libertyware TRMLR80 Refrigerator/Freezer Thermometer features a liquid-filled design for accurate temperature readings. It has a wide temperature range of -40 to 80°F, making it suitable for both refrigerators and freezers. Constructed with durable stainless steel housing, this thermometer is built to withstand the rigors of daily use. It is NSF certified, ensuring it meets strict public health and safety standards. Ideal for maintaining optimal food storage conditions, this thermometer is a reliable tool for any kitchen.