Product review (4 stars): H.V.A.C tech ,good for wet bulb temp for superheat.
I'm a H.V.A.C technician,and this seems to be good quality for price, seems solid ,dont want to have it loose in toolbox ,but in a holder ,it seems like it will hold up .backlight would help,but seems to be accurate. Only used once to check wet bulb temp at return duct. Got the other one of this brand off Amazon ,it's the 35dollar one and only difference i found is the backlight,if you don't need light ,this $25 will do just fine in my opinion.