1) Material: Flexible silicon body 2) Ultra bright and long life LED used 3) Light weight and easy to install on your bicycle 4) Include one white light and one red light as one pair 5) 3 switch function: Fast flashing, slow flashing, and constant on 6) Battery included 7) Battery runtime: Approx 30 hrs for constant Approx 130 hrs for flashing mode 8) Water resistant 9) Universal fits design