Key features Temperature range: 30 to 20 C with a large, color coded scale for quick reading. The blue, green, white, and red zones help you assess safe storage temperatures at a glance. Battery and reliable: Mechanical design requires no power source, providing a dependable readout without maintenance or replacements. Versatile mounting: Hook type design allows hanging or placement in different positions to suit your refrigerator, freezer, or insulated box. Durable and clear: ABS plastic construction with a protective lens for long lasting use and easy cleaning. Clear compatibility: Suitable for traditional refrigerators, freezers, and insulated boxes. Product details Material: ABS plastic with a protective lens Readout: Large, easy to read temperature scale in Celsius Mounting: Hook style, can be hung or placed in various positions Power: None required (mechanical) Why you need this Helps you maintain food safety by accurately monitoring storage temperatures without batteries or electronics. Quick, ataglance assessment reduces guesswork and minimizes the risk of spoilage. Durable, low maintenance design fits into standard fridge, freezer, and cooler workflows. Use scenarios Home refrigerator or freezer: Place or hang the device inside to continuously monitor the temperature and ensure foods stay within safe ranges. Insulated cooler box or lunch box: Use during transport or outings to verify that perishables remain at safe temperatures. Small commercial display or storage: Keep on display shelves or inside cabinets to provide a simple temperature reference for stored goods. Notes The device is designed for conventional refrigeration environments and insulated storage solutions, providing a mechanical, battery temperature reading that is easy to read and interpret.