Features1Improve safety: Improve the visibility of cycling, jogging, hiking, and camping at night, making you feel safer in the dark. 2Applicable to: You can wear it on your body and install it on your pet's collar or on your bicycle. 33 lighting modes: This safety light has 3 unique lighting modes: stable lighting, fast and slow flashing. 4Lightweight: Lightweight, compact design, easy to carry. 5Easy to handle: The lights are to be fixed by clip or hook and loop fastener.SpecificationMaterial: ABS + electronic componentsSize: about 5.5*3.0*1.8cm/2.16*1.18*0.70 inchLight source: 5LED bulbPower: 2*CR2032 button batteryFunction: always on / flash / slow / offLighting time: about 48 hoursPackage List1* running warning light1* bandage sticker1* screwdrive