Real 1000 Lumens Bike Headlight ---- There is no cheap marketing trick, false parameter or exaggerated claims here. Our new bicycle front light F1 has a true, lab-verified output of 1000 lumens with up to 492 feet wide and long range with single LED cell to be compact and durable, plus certified IP67 waterproof and FL-1 impact resistant. You get what you paid for. Smart Mode ---- Simply press Power Button once shortly to change among 4 Normal Patterns: High (1000 lumen, 3h), Med (600 lumen, 4h), Low (300 lumen, 8h) and Flashing Modes (8h) while press it 3 seconds to enter or exit the Lights Sensing Mode: The front light can adjust its proper brightness according to the ambient light. The darker it is, the brighter the bicycle lamp and vice versa. USB Rechargeable with Decent Battery Life ---- 3 Hours fast charging with power indicator. With its built-in 2600 mAh lithium battery, this cycling light can be charged with any USB device, saving your time and money in buying and changing batteries. Fits Every Bike ---- Designed to be waterproof IPX6 against rain and easily installed without tools for all type of bikes, road bike, mountain bike MTB, hybrid or commuting bike.