Review on Motorcycle ATV UTV Boat Generator Mower Chainsaw Digital Tachometer Maintenance Tach Hour Meter with Replaceable Battery by Terrance Singletary

My favorite of the three brands of small tachometers I've used. Self-adhesive Velcro with battery cutout for quick and secure attachment. Accurate RPM readings once set to the correct mode. Excellent guide. The only thing I don't like is the coiling of the wire on the plug wire - it doesn't hold tight but still works in a loose loop. Overlap tape tightly. I particularly like the fact that you can switch off the device.