The wrist band with 4 bright LEDs help improve visibility and safety at night. It is perfect for jogging, cycling, running, and other outdoor activities at night. Features: 4 super bright LEDs each band, luminous up to 200m. Highly visible LED lights keep you safe. 2 modes: flash, constant. Elastic band and adhesive fastener closure for a comfortable fit. Powered by a CR2032 battery. Suitable for joggers, cyclists, runners, inline skaters children, etc. Specifications: Material: TPU + ABS + Elastic band LED Color: Blue / Orange / Yellow / White (Optional) Battery: CR2032 Size: 3 * 39.5cm / 1.2 * 15.5in Unit Weight: 18g / 0.6oz Package List: 2 * Armband Outdoor Sports Led Night Safety Reflective Wrist Band Bracelet For Cycling Walking Running