Features 1、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. 2、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 speed (can be set to overspeed alarm), time display can be automatically calibrated by for GPS. 3、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. 4、Wide Application: This digital GPS speedometer has a wide range of applications and can be used in industrial, automotive and home electronics. 5、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 ) How To Use: 2. After powering up, it defaults to the time display page. If GPS doesn't receive the signal, the time will show 00:00. get outdoor, after receiving the GPS signal, the speaker will sound and calibrate the time automatically. 3. In the clock display page, press S2 to switch to the temperature and humidity display interface. By default, the temperature and humidity will be displayed in turns every 5 seconds. Press S3 to return to the clock display interface. 4. In the temperature and humidity display page, press S2 to switch to the speed display interface. If the for GPS is not receiving signal, the speed will show 000. you need to connect the for GPS outdoors to see the moving speed. Press S3 to return to the temperature and humidity display interface. 5. In the clock display interface, long press S1 button for 2 seconds to enter the time format setting. You can press S2 or S3 to switch the time format, which supports 12 hours and 24 hours system. Press and hold S1 again for 2 seconds to enter the time setting. Press S3, hour +1, press S2, minute +1, you can also not set here, for GPS will automatically calibrate the time. Press and hold the S1 button again for 2 seconds to return to the time display. In temperature and humidity display interface, long press S1 button for 2 seconds to enter temperature and humidity display setting. Press S2 or S3 to switch the display content, C stands for only displaying temperature, H stands for only displaying humidity, and AUTO stands for rotating temperature and humidity display. (Default is AUTO). Press and hold S1 again for 2 seconds to enter the digital tube brightness setting. There are 8 levels of brightness display, press S2 or S3 key will display the brightness level. Long press S1 button again for 2 seconds to return to temperature and humidity display interface. 6. In the speed display interface, long press S1 button for 2 seconds to enter the speed limit setting. The default speed limit value is 120, which can be adjusted by pressing S2 or S3 key, and the buzzer will alarm when exceeding the speed limit value. Press and hold S1 button again for 2 seconds to enter buzzer setting. Press S2 or S3 to adjust, display "BEE" for buzzer on, display "OFF" for buzzer off. Press and hold S1 again for 2 seconds to return to the speed display interface. All the modified parameters will be saved automatically and will be used next time when the power is turned on. Package List 1 x Digital Speedometer