Features: 1. The lighting strap is 18cm and the adjustable fasten tape is about 27-32cm. Hook & loop closure for easy wearing. One size fits all. 2. 4 lighting modes(Fast flash/slow flash/always on/off)replaceable battery for about 30-40 hours service time. Save time and money. 3. Lighting design to add more cool and attractive senses. Perfect for Running, Cycling, Hiking, Camping, Parties, Concerts and other outdoor activities. 4. Suitable for brace, arm, leg and other body parts. Wear it to create your own party style at festival or carnivals. 5. Made from quality materials to ensure comfortable and longer service time, it is a nice bracelet for everyone to use in the dark. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Material: PVC, ABS, silicone Lighting Length: 18cm Adjustable Length: 27-32cm Battery: cell battery(included) Color/Style: As the picture shown Weight: 65g Package List: 1 x Lighting Safety Armband