... : 1.Apply: It is used to record working hours for testing engine R Speed with the Gasoline engine, ATV, Motorbike, Motorboat ... trough of hour meter.3.Function1. Records of the apparatus working hours, resolution of 0.1 hours.2. Display testing engine R ... -speed, error ± 5 r / min.3. Warning and flashing function. 4. Warning and flashing function1. The new hour meter ...