UltraFire LZZ-U3 2-LED 4-Mode 1800lm White Bike Light / Headlamp - Black (4 x 18650)
When it is turn-offpress the switch for 3 seconds to turn on the Fast Strobe Modepress the switch again to change from Fast Strobe Mode to the Constant Output Mode. With mini telescope shape extremely light weight and small volume the UltraFire LZZ-U3 2xCree XM-L2 U3 4-Mode 1800LM bike light can be smartly mounted on you bike or helmet. The powerful battery pack is strongly sealed with plastic and is rechargeable.