VIVOSUNDigital Thermometer and Hygrometer with 3 Remote Sensors, Indoor Outdoor Temperature and Humidity Monitor with Touchscreen LCD Backlight, 200ft/60m Range, Battery Included

Have bought a few of these because they are my favorite among the ones I've tried. Nice large numbers and large display, high contrast LCD. Pretty long battery life, even with rechargables. The sensor batteries especially last a long time (I use lithium so I don't need to change them much, lasts well longer than a year). Nice to see the humidity levels inside and outdoors.Up to three channels for multiple sensors. It can progress through each sensor, showing the value, then moving to the next. Or you can set each one to show just a single sensor, and flip through by touching the screen. Very functional touchscreen. Nice blue light when you want it. Seems like good accuracy.I keep one in the fridge too, and put a sensor down on the bottom shelf in the back. That gives me two temperature measurements so I can keep it good and cold but without freezing stuff in the back.I don't like the white color. It visually dims the display effect. So I put some black gaffer tape along the edges to make it completely black. I think it looks much better this way, and also gives it a nice grip texture. I think they should make them flat black not white.Great product, have had a few for several years, no failures. It's the only kind I use now.

UPDATE...I came to order another Vivosun thermometer (this time with multiple sensors) and thought I'd update the review. Everything from the original review still applies and after 3.5 years and the product is still recommended...- It is more accurate than its specs state. For the unit I received, the temperature is accurate to within 0.5°F (as measured against a very accurate and calibrated thermometer). The indoor hygrometer syncs very closely with my dehumidifier's humidistat reading as well.- It is higher quality than another similar brand (which quit after only a few months). This Vivosun is still working perfectly.- It is expandable (up to 3 sensors). If you don't want to have 3 screens to read 3 areas, that's OK. Just buy another sensor or two and add them to your current unit. Set up is quick & easy.- No need to install any app. This uses local wireless RF (not 802.11 networking)-ONLY bone of contention I have is that the screen-unit needs larger (or more) batteries. It takes 2 AAA (same as the sensors) but with an always-on, sometimes-lighted screen, it really needs either 4 AAA or 2 AA so they don't need to be replaced so often (about every 3 months) (the sensors are fine with 2 AAA)Extra Note:- If you have multiple sensors, you can set the display to show 1 sensor all the time (and then manually tap to see the others) OR you can set the display to cycle continuously through all the sensors at 5 second intervals. This is not listed in the instructions, but is a welcome feature.ORIGINAL REVIEW from 3 1/2 years ago:Been a couple of months now...Wanted to see how it was before writing a review. In short, it's pretty good. I can't really find anything that should knock off a star. The display is large enough to read from about 10 feet (3 meters). A lower-left screen-tap turns on the back-light for a few seconds. The outdoor sensor reads accurately and the humidity sensor seems to work well enough too. No wires is nice, and so far, the battery does not show any signs of wearing down yet. So overall, I'd recommend it and so far, I'd buy it again.

The batteries included in the pack did not last very long : less than a month. What a shame.

Works just as described if not better. The weather channels are always centered in populated areas and I don't live there. This lets me know exactly what the temperature and humidity is in my backyard. It don't get no more accurate than that!It probably took me about 3 minutes to set up, and most of that was reading the instructions and paperwork that came with it. Really I think all you have to do is plug in the time and time zone. After that you just have to find the right spot to place to hang the outside part. No direct sunlight, no harsh winds. It's more or less a matter of common sense.It's not big and ugly so it usually sits on our coffee table. We had a lesser version of this that only told the temperature. It finally went after about 7 years so we got this and we're both extremely pleased (the HB and me). No more going out over or under dressed because we didn't take the humidity into account. What a difference that makes!I highly recommend this. If need temperature and humidity for both indoors and outside, this is your baby. Plus... you can buy extra units (three total) to put in other places. I'm in the process--well, I will be in winter--of trying to determine whether I should store paints and even extra canned food in my three season sun room or my garage. I'm not sure which spot is less likely to freeze. No use for frozen paint, even for touch ups, and frozen soup just doesn't taste good. You know?Great little set and very fairly priced!

I owned this for four and a half years with no problem so I decided to opt for function vs. the flash of higher priced color screens, although they did lure me in for a while. Anyway, I ordered the same model this time function failed me. Unfortunately the sensor simply mirrored the inside temp within a degree no matter what the outside temperature said. I tried resetting it: no luck. Then when the temperature dropped to 40 degrees last night. the sensor said 88 degrees. I've exchanged this for another model because, well originally it did work flawlessly for almost five years. Will update this if new model is a success and give another star.