Diameter:2"/52mmCurrent:IGN MAX 0.3A ILM 0.3APower:DC(10-15V) 12V ProfessionalLED super white display.Red LED illuminated needles.Smoke tint lens during the day，Clear and bright LED Display during the night.Add a racing look and feel to your ride，High quality and light weight.Suitable for Replace 2"/52mm All < 2 Bar(200 KPA) Turbo Boost Gauge Auto Truck Boat Motorcycle and other Motors.Comes with Mounting and Installation hardware.Easy Installation With Users Manual In English，Professional Installation is Highly Recommended.Package Include: 1 x Air Fuel Ratio Gauge