1This LED security lights with luminous bands can help to improve visibility and safety at night. It makes running, walking, biking and other outdoor sports safer at night. 2It is lightweight and comfortable to wear, free from exercise restrictions, and will not cause tangles even if it is directly attached to the skin. 3The strap can be adjusted to the appropriate arm size, just tie it to the arm, wrist or calf, press the switch button, and it will work. Free switch of 3 light modes for you to choose, including fast flashing, slow flashing, and constant light. 4With adjustable hook and loop fasteners straps, it can be tied to your arms, wrists, calves or wherever you like. 5With wide application. Suitable for outdoor night sports, such as jogging, walking, cycling, concerts, camping, outdoor sports, etc.