This is another must-have-for-work item. We have to check ambient and product temps and there's not many of these at work, so I bought one for my line. This thing is virtually weightless really. It's amazing. It gives nice, accurate readings. The laser is a nice touch so you can see where you're pointing. It also gives readings in Fahrenheit and Celsius depending on what you need. And the single 9v it takes lasts months.