Optional Charging Mode - Two optional charging modes: 18650 battery or USB charging(Package list batteries are not included), very convenient. Just place it next to the car when you are in trouble. Ensure Driving Safety - When your car breaks down on the road, you can place a slow moving vehicle sign on the back of the car to ensure your safety. Easy to Carry - This slow moving vehicle triangle is lightweight and compact, portable to carry in your car, keep you out of danger. Bright and Eye-catching - The orange emergency warning triangle is highly visible at night, day or any weather and is easily seen by vehicles from a distance. Note: The data are all manually measured, please allow 1-3cm error due to different light and display, there may be some color differences, please refer to the actual item received.