Features: LED Armband bright at night, with high-visibility to protect your safety. It suitable for morning running or night running, cycling, walking, pet walking and other activities. Suitable for most people, just wear it on wrist, ankle, arm and other parts. It comfortable to wear, with proper elasticity, durable and not easy to fall off. Lightweight and soft, luminous cufflinks are easy to wear and support long-term wear. The adjustable-designs helps wrap the wrists or calves securely and great for the arm, wrists, ankles and legs. It powered by 2pcs button battery (included), providing 360degrees ultra-high visibility in dusks and night activities. Specifications: Material: PVC Color: white/blue/yellow/green-color/colorful/orange Size: As-Shown in the Picture Battery: 2x Button Battery (included) Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Luminous Running Armbands