Faria Beede Euro Black 4" Tachometer with Hourmeter 7,000 RPM Gas - Outboard universal-phone-holder Clamp Range: Up to 5"

Clamp Range: Up to 5" wide and 2

rubber exterior helps protect mounting surface

No-Drill  adjustable mounting base designed to fit a wide range of vehicles* Installs in minutes with no drilling required on passenger side floor

Flexible fins can be trimmed for a secure fit and portable installation

Arm Length: Short

Faria Beede Euro Black 4" Tachometer with Hourmeter 7,000 RPM Gas - Outboard universal-phone-holder Clamp Range: Up to 5"Electronic tachometers work by counting pulses generated by the ingition system, alternator, tach signal generator or magnetic pickup sender. The tach is hooked up to +12VDC, Ground and one of the signal sources listed above. By selecting the right tach and setting the switch on the back to the correct position you let the tachometer know how many pulses are sent per each engine revolution. Features: Anti scratch glass lens Plastic Cases for corrosion