Product review (4 stars): Great Value
Ships from China. My shipment of three never came so I emailed seller and I received another shipment in five days.

I use these in my hydroponic garden. One submerged in the reservoir (probes are epoxy coated), another in a net pot to measure the plants temperature under the lights and a third for ambient air temperature.

They're much more accurate than my old RS/Oregon readers although they tend to read about a half degree high when comparing to my Fluke meter with probe but I never calibrated that either.

Anything within 1C is good enough for me at this price. Thank you, seller.