Features: 1.The tachometer is used in 2-stroke or 4-stroke engines. 2.Applied to all gasoline engines 3.The speed timer is completely waterproof 4.Inductive design, only need to tie the connecting wire to the spark plug to operate 5. Large timing range: 9999.9 hours, large speed range: 9999RPM 6.LCD display 7. Low voltage design, built-in battery power supply mode, safe and reliable 8. The battery life is more than 3 years 9.Timing function: 1) When totaling: when a group is totaled, it cannot be cleared when totaling 2) Timing accuracy: 0-9999.9 is 0.1H,10000-99999H is 1H 3) Timing method: magnetic induction timing 10.Speed function: 1) Speed range: 0-9999RPM, when the engine is working, the current speed will be displayed in real time 2) Speed accuracy: 10RPM 3) Refresh rate: fixed 0.5S 4) Stroke selection: fixed 1P1R Specifications: Product name: gasoline engine speed timer Wire Length:about 1100mm Display mode: LCD Screen Size:24*10mm Product size:53.5 mm*36.2mm*14.6 mm Timing Accuracy:0.1 H Timing Range:9999.9H Waterproof:IP68 N.W:55g Housing Material:ABS Packing size: 190mm*113mm*25mm The package: 1 x Hour Meter 1 x Cable 2 x Screws Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.