Short Description:The completely waterproof engine RPM hour meter works on all gas engines. With LCD screen display. The timer can be reset and easy to set 2， 4， cycle engine for manual. Induction type design， just need to tie the cables on the spark plug， it will operate. Low pressure design， with built-in battery power supply， safe and reliable. Suitable for your motorcycle， ATV， boat， and generator.Item Description:Feature:- The engine RPM timer is completely waterproof- Works on all gas engine.- Induction type design， just need to tie the cables on the spark plug， it will operate.- Maximum RPMs is 99999， maximum timing is 9999.9 hours- LCD screen display- Low pressure design， with built-in battery power supply， safe and reliable.- Durable， battery life more than 2 years- Easy installation， no power or ground required- The timer can be reset and easy to set 2， 4， cycle engine for manualColor: SilverVoltage: 3VMaximum Timing Range: 9999.9 hoursMaximum Speed Range: 9999 RPMOperating Temperature: -30 ~ +85 centigrade degreeFitment: All Gasoline Engine， Marine， Motorcycle， Snowmobile， ATV， Generators....Product Size: 52.5 x 32 x 15.5mmProduct Weight: 23gPackage Weight: 53gPackage Dimensions (L x W x H): 178 x 101 x 20mmAfter Sales Service: 1 Year WarrantyPackage Including:1 x Hour Meter1 x Set of Installation Accessories