





Product description
US Patent No.:D138779S
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Carefree Fish Aquarium Led Display Thermometer Merchant Video
Do not use hot water or cold water to test the accuracy of the thermometer. Abrupt temperature changes may cause damage to the thermometer’s chip.After installation, wait for 5 minutes and you can measure the accurate temperature.

Measurement error: ±0.9℉
Since the temperature being measured is that of the outer glass of the fish tank, if the temperature difference is significant or if a heater is used, the water temperature inside the tank will not be stable, and the measurement error can reach 2~6℉

Measurement range: 32 – 140℉
Replaceable Battery 
Rotate-Open 
Rotate-Close

Quick installation and replacement of batteries
It cannot be moved after installation. It is equipped with an extra adhesive. The thermometer can be removed by using a thread.

Touch-Wake up
It will automatically turn off after 10 seconds.
Sense of Technology 
LED Display
The temperature value can be clearly read both during the day and at night

Small Size
Size:1.7*1.7*0.4Inch
Battery Model:CR2032
Product Dimensions : 1.7 x 0.4 x 1.7 inches; 1.45 ounces
Item model number : SZYXJWDJ1
National Stock Number : 70121801
Batteries : 1 CR2032 batteries required. (included)
Date First Available : August 20, 2025
Manufacturer : Carefree Fish
ASIN : B0F63GVKRD
Best Sellers Rank: #17,802 in Pet Supplies (See Top 100 in Pet Supplies) #15 in Aquarium Thermometers
Customer Reviews: 4.5 4.5 out of 5 stars (135) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Replaceable Battery:CR2032.Battery life up to 1 year.With the card-insertion design, after installation in the fish tank, the thermometer can be quickly removed and reinstalled again.
Temperature Range:32~140℉.Accurate Temperature Measurement:Error range ±0.9℉.
Easy Installation:Use the back adhesive to attach the thermometer to the outside of the fish tank, below the water surface. After 5 minutes, you can measure the water temperature inside the tank.
Touch Wake-Up Function:Each time it is touched, the thermometer goes off after 10 seconds.
Note: The thermometer is not waterproof. The thermometer is firmly installed after being attached. After determining the installation position, it is then securely fixed onto the fish tank. Once installed, it is difficult to move. We have provided 1 spare adhesive.
8 reviews for Carefree Fish Aquarium Digital Thermometer Cordless Replaceable Battery LED Display Temperature Measurement Error ±0.9℉(US Patent Number:D1038779S)
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