Easy to useFour modes for headlights: high, medium and low flashing, 6 modes for tail lights, high, medium, low, slow flashing, fast flashing, warning flashing, just press the button to switch the mode, double-click to enter the strobe mode, long press for about 1 second to close. You can use it in all weather conditions. Brighter light should be chosen in places where you need to leave for long distances, or during the day/twilight. LONG BATTERY LIFETwo bicycle lights can be used for 3-12 hours (depending on different modes), and it only takes 1 hour to fully charge. Great for urban road and road riding, visibility to other riders and in-traffic. When youre on a pulse, the flashing light option extends battery life and appropriately engages others using the path. Premium DesignThe bicycle light adopts a new design without chrome ring. You dont need to waste glue to keep the trim ring from falling off or disappearing. The light backrest is designed to be more suitable for handlebars, seatposts, seatstands, childrens trailer frames and backpacks of various sizes. SAFE INSTALLATIONBike light comes with a newly designed rubber strap, which is thicker than others, with smaller holes than others, more prongs on the rubber strap, and tighter mounting options. Can be easily clipped and securely fastened. Dont worry about bike lights falling off in a crash. Durable IPX5 WaterproofCombined with advanced IPX5 waterproof and dustproof technology, it is suitable for various weather conditions. The USB interface is covered with waterproof and dustproof silicone, so it can better charge the bicycle light and effectively prolong its service life.