Knog Frog Strobe Twinpak - Headlight & Taillight combo Lime Bodies. BE SAFE - BE SEEN ! Knog Frog Strobe Twinpak - Headlight & Taillight combo Lime Bodies. BE SAFE - BE SEEN ! A water-resistant, flexible silicon body with integrated clip fits around any shape and anything you can conceive; as long as that anything is 19-32mm in diameter ! Single high powered LED each 25 lumens strobe system with lens, One Red LED Taillight & one White LED Headlight ! Uses 2 CR2032 batteries, included ! 50 hours of burn time steady, 80 hours flashing ! Four modes; constant on, strobe, disco inferno strobe (fast), epeleptic fit strobe (random) !