Tachometer with hour counter is designed to measure the rpm and operating time of a gasoline internal combustion engine (suitable for 2 and 4 cylinder gasoline engines); The waterproof housing makes this device irreplaceable for outboard motors, motorcycles, brushcutters, snowmobiles, gasoline generators and walk-behind tractors. The LCD screen has a built-in backlight which is good for dark rooms where there are gas generators. When the engine is running, the engine speed is displayed and when the engine is not running, the operating hours are displayed. An inductive tachometer, an hour meter, is simply necessary to control motor vehicles that do not have such built-in devices. After all, it is very important for the proper maintenance and operation of motor vehicles.