U UNNI Refrigerator Thermometer Alarm — Wireless Dual-Sensor Fridge & Freezer Monitor, 4.5" Display, 90dB Alarm

This compact digital thermometer is built for dependable cold-storage monitoring at home, in small businesses, or during travel. It uses a precision Swiss sensirion sensor and transmits temperature data wirelessly up to 328 feet (100 meters) with updates every 30 seconds. The unit accepts USB power to keep the backlight on or runs on batteries for portable use; a bright 4.5-inch display shows two sensor readings simultaneously for instant status checks without opening doors.

How accurate and wide-ranging are the temperature readings?

The device delivers reliable temperature measurement across extreme conditions, covering -40°F to +158°F and reporting with ±1.8°F accuracy. It pairs a high-quality Sensirion sensor with stable wireless transmission to reduce false readings. You can choose between 24-hour auto-reset or all-time max/min recording for tracking trends over different periods.

• Temperature span: -40°F to +158°F
• Reported accuracy: ±1.8°F
• Max/min logging: 24-hour or continuous mode
• Data refresh rate: every 30 seconds

What alarm and alert features protect stored food?

Set upper and lower temperature thresholds and the thermometer will emit a loud 90 dB alarm when readings move outside that range, helping you respond quickly to melting, thawing, or spoilage risks. The alarm repeats every two minutes to ensure the alert is noticed. Because readings are accessible without opening doors, you avoid needless temperature spikes when checking conditions.

• Audible alarm volume: 90 dB
• Repeat reminder: every 2 minutes until acknowledged
• Separate high/low limits for each sensor
• View both sensor temps on a single display

How does power and display control work for continuous monitoring?

Power via the included USB cable for uninterrupted backlight and three-step brightness control (high, low, off), or use batteries for a portable setup where the screen lights for ten seconds on interaction. The 4.5-inch color display is designed for quick glances and bold numerals so you can assess conditions at a distance. Magnetic, stand, and hanging options allow versatile placement inside or outside the appliance.

• USB powered keeps backlight on and adjustable
• Battery mode conserves power; screen lights 10s on tap
• Display size: 4.5 inches with color backlight
• Mounting: built-in magnet, foldable stand, hanging hole

How many sensors and what range does the wireless link support?

The kit includes two wired sensors so you can monitor fridge and freezer simultaneously and compare conditions on one screen. Patented wireless technology maintains a stable connection up to 328 feet (100 meters) in open space, with frequent updates so readings stay current. Each sensor attaches with a hook for flexible placement within compartments.

• Includes two temperature sensors with hooks
• Wireless transmission range: up to 328 ft / 100 m
• Update interval: roughly every 30 seconds
• Records max/min per sensor independently

Who is this for: This U UNNI wireless refrigerator thermometer fits homeowners who want peace of mind about food safety, small food-business operators tracking cold storage, caregivers managing medications, and travelers needing portable temperature checks. It’s suited to anyone needing accurate dual-zone monitoring, audible alarms, and flexible mounting options without complex setup.