ChillChek - Waterproof Thermometer with Breakaway Lanyard | Water Proof Temperature Gauge for Swimming, Diving, Snorkeling, Fishing, or Backpacking

Biggest waste of money I’ve ever spent. Suppose the cord is decent

Temperature measurement marks are set at increments of 5. If you’re trying to measure something more specific this is not the thermometer for you. (I ended up needing to know temperature to the exact degree or two. I learned that certain fish will bite at 52°, but virtually disappear when the water temp measures 53°.) Good thermometer if you do not need specific temp (for example if the water is in the upper 50’s vs lower 60’s). Thermometer was waterproof and compact.

I bought this to attach to my float for cold water swimming. It works as advertised! As it is very small, and my eyes are over 50 years old, it's a little hard to read when you're bobbing out in the water, and because it is small the gradient is very chunky, so it's hard to tell if the water is 50, 51, 52, etc... but when the water is that cold, it doesn't matter that much! It's cold!

It didn’t work from the start-always read 80-never changed and was very hard to read. Non returnable item.

Disappointed I did not read the reviews prior to purchase.Product is well made but temperature markings are not accurate enough for cold water swimming as they are in increments of 5 degrees.Size is good to attach but hard to read.As stated, temperature reading slow.In future, I'd prefer to have a clip-on versus a cord and something more accurate and more easily readable.