Adjustable Bike Light - Easily manual adjustment focus that will provide how large or small the beam light is, the smaller range is more brighter the wide range will give enough brightness.
Free Tail Light - please remove the protecting plastic barrier inside the battery slot during the actual installation, then it can be used.
Bike Led Light Battery - you can use 3 x AAA Battery or 18650 battery for the flashlight. When you use 3 x AAA Battery, don't install the portable 23mm cartridge; when you use the 18650 battery, you must install the portable 23mm cartridge.
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