Multiple charging methods: There are two charging methods for the warning lights: cigarette lighter and USB charger. You can use the USB charger to charge in advance. The charging time is generally from 3 to 4 hours and the using time is 8-10 hours. The product is equipped with a lighter in the package, and can also be installed on the car. Easy to open and close: a switch controls three different modes and on / off. The mode includes multiple temporary flashlights, multiple security flashlights, rotation and uniform recording. get different modes needed in different scenes. Easy to install and remove: The warning light is equipped with a strong magnetic base, which can attach to the roof of your car, truck, van or emergency vehicle in seconds, easy to attach and to remove. waterproof and durable. Multi-function: This LED warning light is suitable for foggy, rainy and snowy seasons. Ideal for emergency use with bright, long-lasting light. Emergency lights can be used for personal work