1. Made of POM engineering plastic, durable and long-lasting nylon buckle 2. Large-view rearview mirror, no need to look back when riding, safe and easy riding 3. HD acrylic lens, clear mirror surface 4. 360-degree free adjustment, three-stage adjustment, more convenient to travel 5. Extended nylon wrist strap, which can be adjusted according to arm size 6. Wrist-worn design, easy to travel 7. Material: POM engineering plastic, acrylic lens 8. Size: the length of the strap is about 30cm, and the mirror is about 5.2cm 9. Weight: about 35.4 grams