Highlight LED, with more than 5 times of brightness than normal light. Wide light irradiation distance range, 30~50m at night, 220' viewing angle, perfectly ensure your safety when riding; Waterproof, with rechargeable 800mAh 3.7V lithium polymer battery, usually need 3~4h to be full charged; Discharge time: 3h in Hi light, 5h in Low light and 12h in flash light mode. Easy to install; Adjustable silicone buckle, suitable for different handlebars (1~4cm); 360 ° rotating base design, can casually adjust irradiation direction.