Feature: 1. Suitable for replacement of 2in/ 52mm all turbocharged gauges <2 Bar (200 KPA) car truck motorcycle and other motor. 2. Smoky lens during the day, clear and bright LED display at night. 3. Great modification gauge to give you vehicle a racing look. 4. The Numbers and hand show clearly, and the lighting on the dial makes it easy to read in the dark. 5. High sensitivity and easy operation with a display range of 0-10000 RPM. Specification: Condition: 100% Brand New Item Type: Boost Gauge Color: As Pictures Shown Diameter: Approx. 52mm/2in Current: IGN MAXIMUM 0.3A ILM 0.3A Power: DC（10-15V）12V Professional Display Range: 0-10000 RPM LED Color: Super White Light Pointer Color: Red Display Color: Smoky lens during the day, clear and bright LED display at night. Application: Suitable for replacement of 2in/ 52mm all turbocharged gauges <2 Bar (200 KPA) car truck motorcycle and other motor How to install: 1. Gauges can be installed in 2 "/ 52mm diameter holes or in the automatic gauge customized mounting panel. Fix the gauge with the attached mounting clip. 2. Drill holes 3/8 "in diameter and install rubber gaskets where pressure or vacuum lines pass through metal plates such as firewalls. Connect the nylon pressure line to the back of the meter using the adapter, spool, and compression nut. Connect the line to the engine compartment through the cable ring and connect the line to the pressure port on the engine using the 1/8 "adapter seal washer and compression nut for the turbine and pressure gauge. Or 1/8 "adapter and vacuum gauge accessories. 4. Start the engine and thoroughly check the installation for leaks. 5. Tighten the lamp holder assembly and connect one wire (yellow) to the dashboard lighting loop or other 12V power supply and the other wire (black) to a good grounding. Package List: 1 x Boost Gauge1 x Nylon Pressure Cable with Adapter (1.87meters/6.1ft)1 x English Manual Note: Professional installation is strongly recommended.