FAST & EASY INSTALLATION - Easily attaches to your helmet in less than 60 seconds using an ultra-strong Buckle pad. Just line it up exactly where you want it, then lock in your preferred adjustment - and you're done Once locked, the mirror stays in position so you never have to worry about it vibrating during your rides. Mounts on both left side and right side with ease.PERFECT REARVIEW VISION - Crystal view flat mirror helps you accurately judge the distance of objects behind you much better than a curved or convex mirror. 360degrees of adjustment allows you to use your peripheral vision to accurately see everything behind, while maintaining a clear view of the road ahead. The shaft length places the mirror at a perfect distance in front of you so it stays steady even during bumpy rides.FEATHER LIGHT & STURDY - Even though it weighs just 12g; you'll be pleasantly surprised by how sturdy this mirror is. The strong polymer & aluminum construction makes this cycling mirror a perfect combination of ultra-strength & feather weight.DURABLE AND CLEAR VIEW - ABS electroplating convex mirror & aluminum rod. No risk on mirror breaking. Only having a glance of it, clear and wide vision easy to get.A MUST HAVE for Cyclists - Bicycle Helmet Mirror allows you to have a clear view of traffic and other cyclist approaching. Increase your safety on the road, added the feeling of security to you Colour:blackMaterial:ABS electroplatingSize:28.5 x 10.5 x 4CMPackage Contents:1 x bicycle helmet rearview mirrorOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.