It's small and light, can be easily attach to the rear of the bike, helmet, backpack, etc.
4 modes adjustable: half brightness/fast flashing/slow flashing/full brightness
IP44 waterproof level, can be used normally in rainy days
With built-in 230mAh battery, about 4.5 hours of using time
Easy to install and remove
Specification:
Light source: 5*2835 LED
Wavelength: 620nm
Power: 1W
Weight: 20g
Material: ABS
Size:70*30*30mm
Power source: Built-in polymer battery(230mAh)
Runtime: 4.5H
Charging time: 0.5H
Waterproof: IP44
4 Modes: half brightness/fast flashing/slow flashing/full brightness