Features: 1.This Turbo boost gauge's measuring range is 0-200Kpa 2.Stainless steel shell with glass top 3.DC 12V power supply 4.Comes with firm mounting bracket and wires 5.Suitable for autos, racing cars Specification: Features: This Turbo boost gauge's measuring range is 0-200Kpa. Stainless steel shell with glass top. DC 12V power supply. Comes with firm mounting bracket and wires. Suitable for autos, racing cars. Specifications: Material: Stainless steel shell + glass top Body Color: Black Backlight Color: As the Picture Shown Working voltage: DC 12V Size: Approx. 8 x 7 x 6cm/3.15'' x 2.75'' x 2.36'' Package Weight: Approx. 340g Wiring Method: A Set of 4 Wires: 1. Red wire connects + 12V power supply. 2. White wire connects the headlight switch + 12V. 3. Yellow wire connects the ignition switch. 4. Black wire connect the storage battery or car shell. A Set of 2 Wires: 1. Green wire connects turbo boost sensor line. 2. Black wire connects the ground wire. (The last wire is a spare one for similar item connection.) Back Sockets Instruction: 1. 2-pin socket links to external warning light(this item not includes the warning light) 2. 3-pin socket adapts to signal line. 3. 4-pin socket is for battery connection. (When there are two 4-pin sockets, you only need to choose one to connect the power, and the rest socket is ready for other similar item without linking the power again.) Package List: 1 x Boost Gauge with Bracket 1 x Set of Installation Accessories Note: Easy to install but professional installation is highly recommended. PackageList: