Usage Tips:"Item detail:Type: Tiny Tach Digital Hour MeterMaterial: ABSColor: BlackDisplay: LCD displayScreen size: 42 x 12.5mmVoltage: 3VButton type: touch switchRefresh rate: 1sTiming range: 0-99999 hoursMaintenance reminder range: 0-9999.9 hoursSpeed: 0-30000RPMSpeed accuracy: 10RPMTiming accuracy: 0.1hoursWaterproof rating: IP65Induction line length: 1.7MetersSize: Approx.73.5 x 47 x 20mm (max.)Net Weight: Approx.80gApply to:Tiny Tach Digital Hour Meter for Marine Spark Mower Engine EngineFeatures:Large LCD Display Tachometer/Hour Meter.Great for Cart Engines operating in the 25,000+ RPM range.Outing, quad bikes, jet skis, motorcycles and off-road vehicles.Can be reset to zero hours.For all spark ignition engines.Splash Proof.Easy install. Wrap black wire around sparkplug wire willing to work on most engines.Some engines will require hooking up the white ground wire.This hour meter reads up to 9999.9 hours and then resets to Zero.The speedometer reads to 99,999 RPM.Programmable Maintenance hour setting with Service Icon, a reminder when to change oil or other service.Works on all spark ignition engines by selecting engine type using S1 and S2 buttons.The leads are working enough. Includes a single shielded wire with two internal leads.One is to be wrapped around a spark plug wire and the other is a ground wire.Package Contents: 1 x Speedometer/Hour Meter"