Specification Brand : ELING BulletPoint1 : Cut a 111 mm (4 3/8") diameter panel hole. You will need a minimum clearance of 55mm (2 3/16") behind the panel to fit the gauge. Put the gauge in the hole and screw down. BulletPoint2 : Indicating range:Tachometer: 0-3000RPM, Oil pressure: 0-10Bar, Water temperature: 40-120℃ BulletPoint3 : Input Signal:Tachometer: pulse signal, water temp meter: 301-22ohm, oil pressure: 10-184ohm BulletPoint4 : 7 backlights (red, green, blue, white, yellow, cyan, purple) BulletPoint5 : 9-32VDC(12VDC/24VDC) Working Voltage, 100% Waterproof and anti-fogging protection Color : Black+Black ExternallyAssignedProductIdentifier : 7505319602103 IncludedComponents : gauge ItemName : ELING Marine Boat Tachometer Tacho 3000RPM 110mm with Hour Meter Water Temperature 40-120℃ Oil Pressure 0-10Bar 12V 24V (Black+Black, 0-3000RPM) ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : industrial-tachometers Manufacturer : ELING Material : Plastic MeasurementAccuracy : 97% ModelName : ENCHSHANGM1 ModelNumber : ENCHSHANGM1 NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : EL-PART-1746 ProductDescription : Product Features: - Tachometer fit for Car /Truck/ Boat /Diesel Generator Engine /Gasoline Engine -Be suitable for all kinds of pressure sensors, and display the value of oil pressure -Be suitable for all kinds of water temperature sensors, and display the temperature of the water tank. - Waterproof: IP67 - Excellent anti-fogging function; - With curved glass (with anti-fog function). - 316 Stainless steel bezel with curved glass; - Convenient Installation by multi-plug socket connecting way;