I bought this set for my son and he is very happy. Simple screw-down mount and flexible strap provide great safety, holding the bike lights set tightly enough to prevent falling off even on bumpy roads. The lights give clear bright, long reaching lights in the dark, support quick recharge in 2 hours via supplied USB cables with burn time 24 Hours in max and 4 Hours in mininimum setting. It comes with 2 USB cables for recharging.
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