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Product description
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. K2 Use Cases
PS: Use our original OEM power cord for stable regulated voltage; third-party cables may cause startup failure.
Keep your eyes on the road, not the dashboard 
K2 focuses on one thing—displaying your speed clearly and reliably, helping you stay safe on the road
Powered by USB（5V） · No OBD · No Setup
Product List 
The device doesn’t show speed in tunnels or underground garages. Is it defective?
No. GPS signals may be temporarily unavailable in tunnels, underground garages, or enclosed areas.
Once you return to an open area, the speed display will recover automatically.
Why is the speed sometimes inaccurate or 1–2 MPH off?
K2 uses GPS satellite data to calculate speed. Minor differences (1–2 MPH) may occur due to GPS signal strength, road conditions, or weather.
This is normal for GPS-based devices and similar to smartphone GPS speed readings.
Can I adjust the brightness manually?
No. K2 is designed as a simple, plug-and-play HUD and does not support manual brightness adjustment.
Can I switch between MPH and KMH?
K2 displays speed in MPH only and does not support MPH/KMH switching.
Can I calibrate or fine-tune the speed reading?
No. K2 does not support speed calibration.
The speed is calculated directly from GPS data for simplicity and ease of use.
2026 New Speedometer: Improved for the current speedometer signal loss on the market, our car speedometer uses dual-mode chip technology—GPS+BDS signals—with a high refresh rate of 10 Hz for rapid, accurate reception. It can pick up to 32 satellite signals, it maintains a stable connection for precise speed data, whether you’re driving in urban or rural areas
Automatic Brightness Adjustment: The speedometer for cars features intelligent light sensors that automatically adjust screen brightness based on external light conditions. This ensures clear visibility in different lighting situations, whether it’s bright daylight or dimly lit environments at night, providing a comfortable display for enhanced driving safety
Suitable for all Cars with USB Port: Designed with simplicity in mind, our speedometer is easy to install and suitable for all cars with USB port, including cars, motorcycles, and trucks. Whether you drive a compact sedan or a large commercial vehicle, installation is effortless, allowing you to enjoy the convenience and safety benefits of our speedometer
Clearer Display: Our speedometer defaults to displaying speeds in MPH and features a large font design with metal blackout technology that effectively eliminates excess reflections and ensures a clearer display, making speeds very clear even for older people with weak vision or drivers wearing sunglasses
Friendly Reminder: The performance of this product is closely related to the car environment, if your car glass with metal explosion-proof film, it may affect the signal reception effect, we recommend that you choose carefully according to the actual situation
Speed Accuracy: A slight margin of error (0.6-1.8mph/h) is normal for all GPS-based speed tracking devices, consistent with industry standards. If precise real-time speed measurement is critical for your needs, we advise reviewing product details thoroughly
GPS signal strength directly affects the stability of the data, it is recommended to use in the open environment for a better experience. It should be noted that, in tunnel passage, underground garage and rainy and foggy weather and other special scenes, all satellite positioning equipment will have a short signal interruption phenomenon, we hope you understand and bear with us,if there is any problem with the product, please contact us to give you a solution, we will reply you within 24 hours