Installation method: Using a double-sided faucet, peel and apply to the back of the meter and install. For more permanent applications, use a drill template to locate the mounting holes. Do not drill into the oil tank or engine crankcase. The installation will determine the sensitivity of the meter, and in most applications, proper installation sensitivity can be easily achieved. Make it more balanced and get higher sensitivity. Features: 1. Replaceable battery, battery model: CR2032. 2. Time display mode is optional, divided into hour system and minute system. For example, hour system 123.4 means that 123.4 hours is equal to 123 hours and 24 minutes; and 123:06, then Indicates that 123 hours and 6 minutes equals 123.1 hours. Short press the preset button to switch display modes. 3. To prevent the machine from