1Made of high quality materials, which is stretchable and durable to use. 2This LED safety light with reflective strap helps improve visibility and safety at night. 3Just tie it around your arm, wrist or lower leg, press the switch button and you're ready to go. 4Suitable for night outdoor sports, such as running, cycling, trekking, etc. 5Come with adjustable strap, can be tied on arm, wrist, lower leg or anywhere you like.