Chinese description Chinese describe characteristics of 1 bicycle enthusiasts, top equipment, have a fever was recommended to buy!! 2, the 1 ultra bright America CREE XML T6 LED, color temperature of 5000K, the highest luminous flux of 980 lumens, designed specifically for cycling and mountaineering lovers. 3, power: the battery pack with capacity of 4400mAh (4 18650), 2 and 2 on design, to provide power, backed by powerful 4: high current charger, charger with overcharge protection and temperature protection, short circuit protection, intelligent fast charging, fully charged, automatic stop, parameters are as follows: input: 100~240v AC 50/60Hz output: 8.4V; DC/1.8-2.3A, 5, : IC dual control circuit 6 files dimming. Constant current, always is a kind of high brightness, no electricity will go out, and unlike step-down circuit will slowly go dark. 6, connection line is the use of 3.5mm in diameter, very durable, the interface is very strong. 7, after the switch, 6 open 2, red switch for outer ring switch, 1 file 2 file for the outer ring is light, flashing. Black switch for headlight switch T6, 1 when the light, 2 file 3 file light, weak light, 1, 2 3 file 3 seconds long into the flash, 8 aluminum alloy vacuum plated with a light reflecting cup, 90 degrees angle, used for riding. Perfect match! 9, waterproof: IP-6, rain completely free riding. 10, applicable to all bicycles, very simple and easy to use. 11, a 360 degree rotating lamp holder assembly and disassembly is more convenient, firm, let you ride more secure.