Review on 📈 ELING 85mm Tachometer RPM Tacho Gauge with Hour Meter for Car, Truck, Boat, Yacht - 0-6000RPM with Backlight by Matthew Goyette

You get what you pay for. Has a weird internal algorithm that they don't clearly explain in the instructions. Tried all settings, nothing good. No response from sales email. I now present you with a fragment from the "Instructions" verbatim for your reference"If your transmitter is mounted on a flywheel, then the gear ratio is equal to the motor gear number. If the speed signals come from w dot signal, the gear ratio is equal to half the electrode plate (poles/2). If it is a gasoline engine, the gear ratio is equal to the number of cylinders (cylinders/2). Say Waaaaaaa! So now I have a big problem turning off the time display. I will say that the backlight, hour meter and style are amazing.