It's a so so product. I am using it from last 3 months
Cons - I have noticed that, whenever your battery comes to end or low, it will start behaving weird. It will show wrong reading, sometime shows Error. And same have when you will keep this open from box at ac room. It will show first reading as wrong reading, usually very high or very low.
Pros - if working normally, then will show next to exact reading.