KUS 8000RPM 85mm 12V/24V Universal Tachometer Hour Meter Gauge for Petrol Engine with Backlight (Black)

A hole of 85mm in dimension and 55mm deep on the dashboard or an additional gauge holder. Screw-on installation. If you need a gauge holder, please search B07M67M1WR 0-8000 RPM with red or yellow backlight. Operating voltage: DC 9-32V (12VDC/24VDC) Gear ratio: 1-10 adjustable, you can press the back button to adjust it. Idle speed is usually 600-800 rpm. Please refer to the installation instructions (English language not guaranteed). Suitable for petrol engines. The tachometer can get the signal from the engine, ignition coil, crankshaft sensor, or tacho sensor (sold separately), etc. If you need a tacho sensor search ASIN number. B0746FCW23 or B0746F56KN IP67 waterproof and dustproof quality. Works up to 1m underwater.