Features 1. The shell is made of cast aluminum and transparent board, and it is installed in an inverted style, which has good rainproof effect; 2. The exterior of the screen adopts a bright surface spraying process, which can be well matched with the car paint; 3. There is a hole at the bottom of the screen for installation with the roof bracket for easy installation; 4. Using DC to DC wide voltage 9 to 36 volt power supply, which can be used by almost all cars; 5. The screen body comes with a delayed start-up function, which does not affect the start of the car; 6. Accurate and efficient with Global GPS fixed-point placement; 7. Wireless control with mobile phone and pad, and the operation interface is simple and practical; 8. Real-time monitoring of the screen; 9. Full color cloud sending Android system architecture, Full Netcom 4G communication; 10. Ali Cloud in-vehicle TAXI_HUB dedicated platform service escorts you in-vehicle interconnection; 11. Standard WiFi module, support platform hotspot Internet access, car hotspot Internet access； 12. Support third-party APP, platform, microservice docking, safe, efficient and reliable； 13. Traffic trajectory, mileage, advertising log statistics, graphical and intuitive.

Portable traffic warning sign is for traffic accident scenes, security checkpoints, drunk driving inspections, and various emergencies. Features 1. Foldable, use linkage system, flexible retractable 2. With pneumatic lifting function 3. Eight-shaped base support frame, wind-resistant design, open with one click. 4. With wheels and handles, easy to carry 5. Equipped with warning lights and display 6. Built-in black box and high-definition camera (optional)