This is a very practical emergency light.There is a magnet behind him that can be attached to metal, such as cars, bicycles, metal doors, metal shelves, etc.There are hooks on the back, which can be hung on the tree, at the door of the car, etc.The LED light (white light) can be turned on the front side and can be illuminated.Product Name: Warning Light Size: height 3.5cm, diameter 10cm Power: 3 sections, 7th dry battery Light source: 12+3 super bright LED lights Material: PTE+PC Package Included:Warning Light