Features: Track the service life of your vehicle-oil changes, valve, adjustments, spark plugs, etc. Easy installation-peel stick,no wiring necessary,or attach with enclosed hardware. No battery required-connecys to spark plugs wire. Works on any gasoline engine. Records and displays to 9,999.9 hours.stand-by time up to over 20,000 hours. Hour glass symbol appears and flashes on/off to indicate counting time. Automatic roll over Resolution 0.1 hour. 100 epoxy encapsulated casing resists water,shock,stand fire of 85 celsius degree Specification: Quantity: 1 Material: Resin Plastic Type: Electronic Gadgets Track the service life of your vehicle-oil changes,valve,adjustments,spark plugs,etc. Easy installation-peel stick, no wiring necessary,or attach with enclosed hardware Works on any gas engine Records and displays to 9,999.9 hours. Hour glass symbol appears and flashes on / off to indicate counting time. Automatic roll over Resolution: 0.1 hour Temperature: -30-85 degC Built-in 1 x CR2430 battery 1.0 LCD screen display Waterproof material Package List: 1 x Hour meter 1 x Cable 110cm 2 x Screws