Product Name: LED Silicone Backpack Light/Bike Warning Light Material: silicone+ABS+electronic components Power supply battery: 2 CR2032 batteries LED bulb: 3 LED lights Weight: 13g Features: small and portable appearance design, can be used for night travel, mountaineering team warning identification, improve travel safety Lighting color: red, blue, green Size: total length 19.5CM, round diameter 3CM Color: The surface is transparent and frosted, and the visual effect is changed by the color of the internal LED lights. Packing: single opp packPackage List 2*Light with Silicone Strap Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.Due to manual measurement, there is a tolerance in the product size. 11.Universal Silicone Strap AccessoryThe upgraded silicone elastic strap allows the reflector to be attached to anything like backpacks, helmets, dog collars, scooters, strollers, bicycle headlights or taillights, and helmet lights are easy to install and secure, will not slip. 22.Super Bright LED LightsThe running lights contain high-quality LED lights that provide powerful brightness both day and night. Whether it's a foggy morning or a rainy day, it's easily visible from hundreds of feet away. Keep you safe anytime, anywhere. 33.3 Lighting ModesReflective walking device provides instant lighting stabilization/flash/strobe with one button. Simple and safe operation, let the whole family fall in love with it. Essential equipment for your various activities. 44.Waterproof and ShockproofThe backpack light is designed with a durable waterproof shell. It's a handy low-maintenance item that's perfect for all conditions when you're running, biking, jogging, hiking, camping, dog walking, and more. 55.Long-lasting and DurableThe stroller light is powered by two coin cell batteries, which can provide up to 100 hours of powerful brightness. You can reuse the safety light by replacing the internal battery (CR2032). Get it now