Uranus Smart Braking Bicycle Tail Light

Specifications:
– Weigh 26g
– Auto Smart Braking Light (super bright for 6 seconds)
– Auto Day/Night detection to self-adjust brightness
– Auto Start/Stop function (after 40 seconds)
– Waterproof IP6X rating
– Up to 20hrs Runtime with USB recharging
– High brightness LED with 5 different light modes