These are a really good value set of front & rear lights. They are charged quickly (within an hour) via the supplied USB cable (nb: you will of course need a normal USB to main socket plug like the kind supplied with a mobile phone). They attach to the bike via a strong stretch rubber connector - so no fiddling around with screw connectors. The brightness of both lights are really good ...can't say how long the charge lasts as I've only used them for an hour at a time but this seems pretty good so far. Highly recommended..
Loved the way can be charged even on I phone lead