Whether the support is really as bad as the previous speaker writes, time will tell. So far, everything works perfectly and I am always happy about it. The LED lights are about 3 min to remain. Since nowadays have very many such Sidelights on the bicycle, I see no increased risk of theft.
Strong buy recommendation.
The price is unbeatable anyway. The cheapest I've seen in bike shops (LED taillights of course) began at about 10. Therefore bought here.