BeSeen LED Armband (2 Pack) Safety Light for Runners Walkers Cycling | Choice of 8 Colors and 2 Sizes| Improves Personal Visibility | 3 Modes BeSeen Sports LED Armbands are Now Available in 2 Count Packages! Make yourself even more visible in low light environments. Features three safety modes: Constant on, slow flashing, and a fast flashing. High quality material and bright flashing lights. Perfect for anyone who spends time outdoors at night or at dawn. Whether you are a jogger, a dog walker, or have a child playing outside, you can feel safer with the BeSeen TM LED Armband. Armbands now come shipped with a battery insulator inserted to ensure fresh batteries upon arrival! LED lights last a very long time and the batteries are very inexpensive and easy to replace. Easily Adjustable. Large size band measures approximately 15 inches from end to end. For best fit, circumference of area you want to wear it on should be a minimum of 13 inches and maximum of 14 inches.