Introduction：This product uses Beidou chip to receive GPS signals from satellites. The hemispherical design makes the control of the product more stable, and the function of slope alarm is added. This head-up display GP11 can directly display your car data in your Within the line of sight, reduce the safety hazard caused by the line of sight down, this product is suitable for all models, no compatibility issues. Function Display：Driving speed, driving time, driving distance, number of satellites, slope, local time, driving direction, altitude, voltage, over speed alarm,Voltage alarm，etc. Special Function：The difference between this product and other products is that it has added a slope function. You can check the inclination angle of your car on the way in real time. When the inclination angle of the car is abnormal, the product will alarm. With the addition of this feature, our products are more able to escort your journey. Compatible Models：This product is a G series GPS mode product, suitable for all cars, and can be used anywhere with satellite signal coverage. When the car is in an underground parking lot, underground tunnel, dense space, etc. where the signal is disturbed, the signal reception may be slow.