1.Package Includes 12 Pieces Blue LED Safety Light, Each Lamp With 2 Batteries Inside, 12 X Mini Screwdriver (For Easily Opening The Back) 12 X Adjustable Velcro Straps For Mounting, Attaching The Light To 's Scooters/Bike Posts, For Headlight Or Tail Light, Dog Collars, Leashes, Helmets Etc. 2.Material: Made Of ABS Plastic & High-Quality LED Lamp; Not Easily Damaged, Slim, , Super-Bright And , Powered By Two Coin Batteries (CR2032); Suitable For All Bicycle. 3.Three Modes Of Switch: The Led Safety Light Can Be Support Full Light, Fast Flash And Slow Flash Mode, With One Simple Push Of A Button, You Have Instant Illumination With 3 Useful Lighting Modes; These Three Modes Help Or Alert Other Riders, Drivers, And Walkers Spot You When Riding In Low Light Or Complete Darkness. 4.Multi-Function: Versatile Blinking Warning Light, Conveniently , Take It Anywhere With You. This Essential Safety Item Has Many Outdoor Activities Uses: It's Perfect For, Runners, Joggers, Cyclists, , Walkers, Climbers And So On! Be Safe, Be Seen By Motorists From A Distance, And While Doing Sports At Night, Dawn, Dusk, Misty Mornings And Rainy Days. It Is The Best Choice For A Wide Variety Of Applications.