The light is simple to assemble and to attach to your bike the instructions although its self explanatory are on the package itself

The light offers has three modes of operation one steady and two flashing i personally like using the steady mode when riding in a park or enclosed area and using the one of the flashing modes when riding on the road

I was a little concerned at first about the small size of this led red rear bicycle light but i was pleasantly surprised to find out that whatever it lacks in in size it more than makes up for on shear brightness