Easy to attach, but every time the magnets passes the light it gives a small 'click'-sound, but without touching.

i love it - never empty batteries - always visible - i feel much more save with it. great !! - i purchased already the 3rd set.

I was getting tired of keeping track of my crappy old rechargeable battery bike lights and I'm so glad I decided to look into alternatives. International shipping to the US was fast, installation was easy, and the lights have performed exactly as described and I think the claims of being theft-proof will hold up even against NYC's notoriously opportunistic thieves! I have been telling every cyclist I know about these lights.

Je n''ai pas compris grand chose aux photos et la vidéo ne me semble pas assez explicite sur l'installation...
Le trou de vissage sous la lampe sert à resserrer l'élastique pour maintenir la lampe (qui est légèrement orientable par rapport à son support).
La "pièce" sert à faciliter le positionnement de l'aimant par rapport à la lampe.
A noter que dans mon cas, la lampe se trouve entre la roue et le support du porte-bagages, donc elle ne gêne pas du tout l'installation de mon sac, et elle est "protégée" dans le local à vélos...

Relatively simple to mount - ~I had trouble with the rear light, but Randi from Reelight sent me a replacement very quickly. All now working and the fact that I don't need to worry about batteries and the lights continue to flash for a time after stopping gives me comfort. An excellent product