Features GPS Measurement Of Vehicle Speed: This digital display speed gauge adopts GPS to measure the vehicle speed, automatically calibrate the time, and you can set the speeding alarm, which is very practical. 3 In 1 Function: This digital speedometer has 3 in 1 function, temperature and humidity display function is that temperature and humidity parameters can be set to display only the temperature, overspeed alarm is thatGPS automatically measures the current Type C Cable Power Supply: This smart gauge speedometer supports type C cable power supply, which can be powered by rechargeable batteries, laptops and many other ways, or by installing a CR1220 botton cell battery. Wide Application: This digital GPS speedometer has a wide range of applications and can be used in industrial, automotive and home electronics. Excellent PCB Material: This GPS digital speed meter is made of excellent PCB material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. Specification: Item Type: Digital Speedometer Material: PCB Function: Time, Temperature, Humidity, Speed Display 3 In 1 Time Format Setting: 12, 24 Hours Time Setting: Hour+1, Minute+1 Temperature And Humidity Display: C Temperature, H Humidity, AUTO Automatic Switching Brightness Setting: 8 Levels Of Brightness Line Speed Setting: 0-200km/h Buzzer Setting: BEE On, OFF Off Battery: CR1220 Button Battery x 1 ( Shipped Without Battery )Package List:1 x Digital Speedometer Package List 1 x Digital Speedometer