Optimized for HW4.0 with No GPS Signal Interference Smooth Start-Up: Features an 800mA soft-start current, reducing pressure on the vehicle's power distribution system to enhance performance and stability. Metal Casing: Provides optimized shielding to prevent interference with GPS signals. PCB Design: Ensures effective grounding, preventing both internal and external electromagnetic interference. Efficient Heat Dissipation: Durable, heat-resistant aluminum casing with cooling vents to effectively lower internal temperatures. Can withstand cabin temperatures from -40°C to 85°C. Please Format Before Use (Do not insert other USB flash drives, as formatting will not proceed otherwise.) Select Screen > Safety & Security > "FORMAT USB DEVICE" to complete formatting.