Installation method: -Use double side tape, peel, and apply to the back of the meter and mount. -For more permanent applications use a drill template to locate mounting holes. -Do not drill into tanks or engine crankcases. -Mounting will determine the sensitivity of the meter, In most applications the appropriate mounting sensitivity can be easily achieved. to make it more balanced to get more sensitivity. Features: 1. Replaceable battery, battery type: CR2032. 2. Time display mode is optional.it is divided into an hour system and a minute system. For example, hour system 123.4, means 123.4 hours equals 123 hours 24 minutes; And 123:06 means 123 hours and 6 minutes equals 123.1 hours. Short press the button to switch the display mode. 3. In order to avoid the machine being transported in the way of an invalid vibration, or other invalid timing, you can shut down the hour meter by pressing the button for 3 seconds, until the display is off'' and start timing pressing the button until the display shows ''' on''. 4. Auto sleep, if there is no ignition signal, and no pressing button. it will auto-sleep in 5 minutes to save the battery. When an ignition signal is received, it will wake up automatically. 5. If you want to reset, please remove the battery and wait for 5 minutes before putting it in. When the battery is running out of power, and you want to save the current data. Please try to put a new battery in within 2 minutes after you remove it. Application: -Wireless hour meter record the actual running time of trailers, motors, equipment, and machinery or any vibrating equipment used on any application requiring tracking quarterly, annual, and preventative maintenance. Specification: -Brand new and high quality. -Track the service life of vehicle oil changes, valves, adjustments, spark plugs, etc. -Easy to install. -Peel and stick, connect to spark plug wire easily. -Battery replaceable, battery type: CR2032. -Works on Any Gas Engine. -Record and display to 9,999.9 hours. -Hourglass symbol appears and flashes on/off to indicate counting time. -Automatic rollover. -Resolution: 0.1 hour. -100% epoxy encapsulated casing resists water, shock, and stand fire of 85°C. Package includes: 1x Digital Hour meter 2x Screws 1x Manual or 1x Digital Hour meter 1x wire 2x Screws 1x Manual