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White rectangular thermometer display with 4.5 inch backlit LCD screen showing large digits, two wireless sensors with hooks

UNNI Wireless Fridge Freezer Thermometer with Alarm 4.5 inch display 328 ft range

SKU CH-B9CT-PQ1SD

Wireless fridge freezer thermometer with 4.5 inch display, Swiss-made sensor accuracy of ±1.8°F across -40°F to 158°F, 328 ft range, 90 dB alarm, and USB or battery power

  • Product colorMulticolored
  • Accurate monitoring with Swiss-made sensor ±1.8°F
  • 328 ft wireless range updates every 30 seconds
  • 90 dB alarm alerts after 2 minutes
  • 5 inch backlit display with three brightness levels
  • USB power keeps backlight on or battery saves energy

Wireless Fridge Freezer Thermometer

The UNNI wireless thermometer monitors refrigerator and freezer temperatures from up to 328 ft away using a Swiss-made Sensirion sensor. A 4.5 inch colour LCD shows simultaneous readings from two included sensors. Designed for home kitchens and restaurant cold storage where remote visibility matters.

Temperature Range Accuracy and Alarm

The sensors cover -40°F to 158°F with ±1.8°F accuracy and refresh every 30 seconds. When temperatures exceed preset limits a 90 dB alarm sounds for two minutes. USB power keeps the backlight on with three brightness levels; on battery alone the display lights for 10 seconds then turns off.

Mounting Options and Recording Modes

Each sensor includes a hook while the receiver offers a magnetic back, foldable stand and hanging hole for flexible placement. Max and min records can be viewed in 24 hour or all-time modes with automatic daily reset. The package supplies the display, two sensors, one USB cable and a one-year warranty excluding batteries.

How it compares

Measured against everything we stock in Digital Thermometers & Hygrometers, at today’s prices. Recalculated every night.

Price $32.99
Pricier than about 74% of the 925 comparable items (median $23.99).

Specifications

Product
Product colorMulticolored

Questions about this item

How do I mount the two sensors inside the fridge and freezer so they stay in place?

Each sensor has a built-in hook; hang them on a shelf or use the magnetic back on the display unit to attach it to the refrigerator exterior.

What power source do the sensors need and how often must I change it?

The sensors run on replaceable batteries; the display can run on the same batteries or stay plugged into USB for continuous backlight.

At what distance does the wireless link start to drop readings during continuous use?

The rated range is 328 ft; walls and metal doors can reduce that, so keep the display within clear line of sight for reliable 30-second updates.

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