Introducing the AUTOOL X60 Car HUD Head Up Display MPH Digital Speedometer Overspeed Alarm OBD2. This device is perfect for passengers owning 12V OBD-II protocol and diesel cars looking for a way to monitor their speedometer. With a supported system of speedometer, this device can accurately display your speed up to 99mph. This 300g device is equipped with features such as Oil Water Temp Speed Alarm, and a 3-year warranty. It has an operating voltage of 10-18V DC and a sleep current of andlt;15mA. The AUTOOL X60 Car HUD Head Up Display MPH Digital Speedometer Overspeed Alarm OBD2 is a must-have automotive tool, made in China.