Abstract: The present invention relates to a new and improved universal device for vehicles, especially motor vehicles which measures the speed of the vehicle and continuously displays the speed on a digital readout display located in the vicinity of the dashboard of said vehicle. A separate digital switch integrated into the circuitry of the device is used to pre-set a reference speed to a desired value. As the vehicle's actual speed exceeds this pre-set reference value, a buzzer sounds and/or the speed display flashes off and on to alert the driver that he has exceeded the pre-set speed. When the vehicle speed falls below the pre-set limit, the buzzer and flashing stops and the device acts as a regular digital speedometer. The device is adjustable, thus enabling it to be used on a wide variety of vehicles.