KETOTEK Digital Thermometer DC 4V~25V, USB Power Supply Aquarium Thermometer Panel -50℃~110℃, Computer Temperature monitor, External Waterproof NTC Probe For PC Vivarium Fish Tank Fridge Freezer

Very pleased with the thermometer. It is especially useful ensuring the temperature of water used to top up the aquarium is correct. It has also been used to check the temperature of the freezer and fridge. Added to that, the illumination makes it easy to read.

As I said, working within 5 seconds of getting it out of the box.My Only gripe is that I Wish they would do a PC water cooling version with a G 1/4 thread in place of the probe.That would then save me having to splice a G 1/4 probe into it!

As an experienced fish keeper I appreciate when things just do what they should - this is a nice little temperature monitor that’s accurate and easy to read. The only downside is the usb lead as per other reviews was a little short.

I have two. These colour thermometers need USB power and nothing else.Having two I can confirm that they are calibrated the same as they read the same when placed in the same tank. just for you dear reader i got my expensive Thermo Pen One I use for cooking and stuck it in my tanks.KETOTEK Digital Thermometer DC 4V~25V, USB Power Supply Aquarium Thermometer was 23.1 degrees and the Thermo pen said 23 degrees and the same difference in the other tank. If you need more accuracy than that then God help you and your fish.One of my Kekoteks is over two years old.The glow from them is quite comforting or disturbing depending if you like a really dark room. I love it.Bye

I purchased this to display the temperature of the spindle motor on my milling machine, where this is by far the fastest updating temperature display that I've come across (it appears to updates at around 10 times per second), plus it's backlit and asthetically pleasing display. There is also a jumper on the back to select Celsius or Fahrenheit. The power is supplied by a USB cable and the waterproof temperature probe is well sealed and connected to the unit via a cable. I opened up the device to check that it can take a higher voltage as I need to use it on 12V and there is a standard regulator on board so can be used at higher voltages. I highly recommend this display where I will be buying more of these for a solar pool project. I will show this on my YouTube channel when I get it fitted to my mill.

I like to see and make sure my fish are safe

I've fitted this in my van, as the external temperature display had failed and I didn't want to spend a fortune getting it fixed. It's only been in place for a few days but seems to be doing the job. Easy to read display that comes on as soon as I start the engine - can't grumble for a tenner!

Nice backlight, unfortunately inaccurate reading. given various excuses and failed to accept their product was faulty even after sending them video showing the reading was in accurate. Sometimes the help and support you recieve explains it all. Sadly had to return the product and wont be looking for a replacement due to bad customer service.