Chinese description of the characteristics of a bicycle enthusiast top equipment it is recommended to buy a fever ! ! 2 using a bright USA CREE XML T6 LED color temperature of 5000K the maximum luminous flux 900 lm for biking and hiking enthusiasts dedicated to creating outdoor . 3 Power: battery pack using capacity 4400mAh ( 4 18650 ) 2 Series 2 and designed to provide a strong backing of 4 power charger : high current charger with temperature protection overcharge protection and short circuit protection intelligent fast charging fully charged automatically stop following parameters: input : 100 ~ 240v AC 50/60Hz; output :. 8.4V DC/1.8-2.5A 5 circuit : IC 3 files dimming constant current from beginning to end is a kind of high brightness no power will be put out since unlike the step-down circuit as will slowly go dark . 6 cables are using 3.5mm diameter very durable very strong convergence of the interface . 7 press the switch: 4 On 1 Off Solid green power :100- 65% :65- 30% solid red red flashing power : 8 to 30% less electricity aluminum vacuum plating reflector lamp cup irradiation angle of 90 degrees for the ride. Perfect match ! 9 Waterproof : IP-6 rain riding completely worry-free . 10 applies to all bicycles very simple to use . 11360 degree rotating lighthouse disassembly is more convenient secure and make your ride safer. 12 four on-off switch design one file for light light 2 files 3 files low light 1 2 3 by 3 seconds long file into flash explosion