G2 4-inch LCD Car HUD Speed Mileage Measurement GPS+Beidou Car Head Up Display ?Display function: speed,clock,driving time,driving distance,number of satelites,driving direction ?Compact body,no matter where it is placed,it is clear and natural,and does not block any sight ?Using 10 Hz high refresh rate GPS+Beidou dual-mode chip,the refresh rate is 10 frames per second,and the speed of the car changes smoothly and continuously ?High-performance processing chip,super performance and compatibility,dual-running memory and dual-core processor to ensure smooth and high-speed operation ?Satellite automatic time service,no difference in every second,not affected by natural factors such as weather ?2 alarm function: speeding alarm,4 hours of continuous driving rest reminder ?Adaptive sensitivity,brightness changes naturally with the environment,clear display,no glare when driving ?Specification: ?Screen size: 4inch ?Product size: 128x36x25mm Package included: ?1 x Car Head-up Display ?1 x USB Cable ?1 x Double-sided Adhesive Tape ?1 x English User Manual