Review on Non-Contact Handheld Digital Tachometer for Precise Measurements by Andrew Grant

Bought to calibrate the tachometer on a boat, everything works great! The laser comes with several reflective strips that you stick on the gear/pulley/object to be measured. I bought a few extra strips in case I want to measure something else in the future. must be turned on again. If it weren't for that little annoyance I would have given it 5 stars.