Review on Runleader Self-Powered Wireless Hour Meter with Vibration Activation, Resettable Job Timer, User Lock Shutdown - Ideal for Generators, Marine, ATV, Lawn Mowers, and Motors by Davey Kamau

I have an air compressor that I've tried this on. I tried two different positions, front and side on the air compressor and both horizontal and vertical - neither worked. There was a strong vibration during operation - I even tried the "Hello" vibration mode - it didn't show a second, what a joke. Like I said, don't waste your money. I was lucky to have it installed before the return period expired.