It has a curved grippy rubber back, and comes with two sets of attachment bands so it can be mounted horizontally or vertically in a variety of places on a bike like the handlebars or seat post. The silicone attachment bands hold the light securely in place, but also allow it to be quickly removed after parking your bicycle. With a durable exterior light housing that provides 180° of light visibility, the Radiant 125 is an ideal front or rear indicator light so you can be seen and be safe, day or night.. Specifications Color: Red; Primary Color: Red; Length: 1.6"; Width: 3.3"; Height: 1.3"; Flashlight Type: Bike; Output Modes: Dual Brightness Levels, Flashing; Output Lumens on High: 53; .