Features: USB Rechargeable: Can be charged by a USB cable for long-term use. No battery replacement required. 3 Modes: Fast Flash (press once), Slow Flash (press twice), Steady On (press third). Button control for easy operation. Waterproof Reflective Strips: High-brightness reflective material for improved visibility at night. Suitable for various outdoor activities. High Brightness: Features LED strips on both front and back. Visibility up to 300 meters. Elastic Fabric: Stretchable elastic material for a snug fit. Adjustable buckles make it suitable for both adults and children. Notice: Actual color may vary slightly due to different screen displays and lighting conditions. Please allow 1-3 cm deviation due to manual measurement. Elastic band width: 4 cm Reflective film width: 1.5 cm Weight: 145 g Suitable for waist circumference: 64-105 cm Shoulder height: 33-46 cm Color/Style: As shown in the picture Includes: 1 x Vest 1 x Charging Cable