Whirling Windmill LED Bicycle Tail Light 8 Light Modes USB Charge Bike Light Waterproof Safety Warning Cycling Seatpost Light

Introductions: Turn on or off, Press for longer than 1.5 seconds. Function mode： always bright, 50% bright, fast flash, backward flash, slow flash, forward flash, leaping flash, windmill flash. Product Information: Size： 25mm long, 40mm wide, 40mm high Weight: 23 g (not including installing support) Material： high strength PC material. Battery when ：3.7V 500mA, charging time is 2h. Runtime:  100% steady 3.10h,  50% steady 6.30h,  fast flash 6.20h , backward flash 12.25h,  slow flash 12.10h ,forward flash 12.05h, leaping flash 18h , windmill flash 4h . USB charge coil： 25cm 1A Charging ways： 5V adapter, computer, USB charger