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 . 11, 360 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 ,