What you will receive: You will receive 2 pieces of bicycle rearview mirrors, which can help you clearly understand the road conditions behind you, so as to avoid possible traffic accidents and reduce the accident rate to ensure safety while riding. The safety rearview mirror is about 2.76 inches/7 cm long and 1.97 inches/5 cm wide, please confirm the size before purchasing. Flexible 360-degree adjustment: The adjustable and rotatable handlebar rearview mirror can be rotated 360 degrees and can be adjusted to any direction, helping you understand the overall road conditions in different directions, not just the conditions behind you, reminding you of dangers in different directions High-quality and sturdy materials: This bicycle rearview mirror is made of durable acrylic convex mirror, ABS and PVC materials, which is waterproof, sturdy and has a long service life; it can still maintain good condition after strong sunlight and heavy rain, and can provide you with a clear view even in bad weather No tool installation required: This bicycle rearview mirror is equipped with a non-slip adjustable rubber buckle, which can be tightly fixed on the handlebar with bare hands, without tools; just install the rubber strap on the handlebar. Suitable for handlebars with a diameter of 0.59-1.18 inches/15-30 mm. You can also easily remove the mirror from the handlebar when you don't need it; please make sure the product size before purchasing. Universal Adaptability: The shockproof acrylic convex mirror can be tightly applied to the handlebars of most traditional bicycles, such as mountain bikes, mountain bikes, motorcycles, electric scooters, etc.