I bought this device many months ago and am very happy with its accuracy. I've used some cheap gear that I just couldn't trust, but I've found this does the job. In the industry I work in, I'm constantly checking engine speeds, driveshafts, gear heads, engine speeds and more. As with any laser meter, you need to know the tricks to get accurate readings. If you're interested in hearing my tricks, just ask. This device is durable and built much better than the cheap devices on the market. it's aβ¦