HYNNIOMini Digital Thermometer Hygrometer, Large Number Display Temperature Humidity Meters Gauge for Home Car Greenhouse Office Jars (3)

I own a three draw humidor so i wanted 3 of these to ensure my cigars are at a good humidity and temperature (one for each draw) these come as a 5 pack, three all matched and two showed different results to each other, only by a few % and 1 degree C. I rate this 3 stars out of 5 because three are accurate out or five. To be fair, those off are only slightly off and i’m not measuring against anything calibrated so unsure which is truly correct

They are OK but I ordered 5 of these and one doesn't work so I've ended up with only 4 and the 4 I have do read almost the same readings but wouldn't advise these to anyone

Everything I wanted and better than I expected for the price, compact and accurate - bud curing really nicely.Look no further

So far (4 weeks) appear to be accurate to within 0.5 degrees which is sufficient for the room temperatures I require. Happy with this purchase.

Considering you get 5 in a pack for me it worked out 1 in each room (kitchen included) - which means I can easily track the temperature and humidity via these little things. I have a dehumidifier which also shows the humidity levels - and funny enough they are always nearly in sync - the difference usually is between 1% - 2% which is quite good. The product also stipulates that there is a margin of 5% accuracy to be considered, which to be fair isn`t bothering me as I only care about ball park figures. Just a heads up, after you take them out of their original packaging, allow them to sit in the room you want to place them in for a few hours for most accurate readings.

Parcel arrived next day – as promised. On opening package there were only four boxes not the five that I expected. However they had slipped two in one box so all OK on that front.Units are small, approx 25mm x 50 mm x 15mm. Batteries already installed and working. These are simple units, apparently you can replace the batteries but there does not appear to be any option for calibrating the devices.Difficult to tell how accurate they are without some sort of comparison. However, the fact that when placed side by side overnight they display slightly different readings (see photos) means they will probably be useful for those requiring a ball-park figure rather than pinpoint accuracy. I am using them to measure humidity for my guitars, which have a fairly wide latitude of between 45%-55% so I think these will suit me well.

Very pleased with the hygrometers. Tested in a ziploc bag with a 72% Boveda pack.

2 of them broke within the first 3 days and started to show weird symbols, just before this picture was taken it said it was 66c and now shows "LL" save your money and buy elsewhere