Specification: Item Type: Strobe Light Number of LEDs: 5 Material: PC Light source: LED Life Span: 30000 Hrs Lumens: 300 Led Light Color: Red/Blue/Yellow/RGB Each warning light Weight: 0.025KG Size: Diameter 28MM x Thick 8MM For Vehicle Brands/Model: Universal Power supply: 3V CR2032 button battery (not included) Quanlity: 4Pcs Features: *New LED technology anti-collision lights. *When the door is turned on, it flashes rapidly, warning the rear to avoid the accident occurred. *Wireless, just paste on to your car door easily. *First 6 seconds "rapid flash" mode, best warning to the rear of the car. After 110 seconds lighting, it will be off automatically. *Then the red cover still can be used to reflect light to remind the rear. *Waterproof cap and build in high-tech component sensor, long service life. *Powered by button battery（battery not included）, easy to replace by yourself. Package included: 4x Sticker 4 x Magnets 4x Car Door LED Warning Light Notice: 1) Due to the difference in light and screen display, the color of the item may be slightly different from the picture. 2) Due to manual measurement, please allow 1-10mm deviation.