20 Pieces Reflective Tape Strips for Photo Tachometers - Non-Contact Digital Tachometer Accessories for Optical and Laser RPM Readings

I put a tiny bit of reflective tape on one blade of my wood stove fan and set it on the stove. Got Varioui legitimate readings at Various temperatures in the operating range of the fan. I've tried this on several devices and never got a reading that was outrageous like 50,000 rpms. Have to assume it's pretty accurate.It comes in a cardboard box that shows the 2 color options available. Inside that is a small black nylon padded pouch for carrying and storage. It even has a belt loop. Does anyone feel the need to quick draw atach and wear it on a belt out there? No? Me either, but you can with this. Lol this is a great tool at a great price.

Seems very accurate- have only tried on one fan so far

I wanted the tachometer to confirm the RPM of my boat engine at idle for timing purposes. When i had idle at around 500 RPM this meter kept reporting 2100 to 8000+ RMP. The documentation doesn’t state how many reflective strips to use, but a picture shows 4, so I guess the device requires 4 strips. I wondered if the 4 strips was confusing the device and tried one strip, but that didn’t give any reading. I do not recommend this device.

Reading are sketchy and irregular

I bought this to calibrate a tachometer on a boat, and it worked great! The laser comes with some reflective strips that you stick on the gear / pulley / item to be measured. I bought a few extra strips in case I want to measure other stuff in the future.The only complaint I had was that the gun auto powers off after a few seconds, so if you're taking your time and measuring various speeds, you'll have to turn it back on again. If not for that mild annoyance I would give it 5 stars.

Did not come with 9 volt battery

The supposed included battery was not in the box.......

arrived on time and as described