Wide field of view: 180-degree field of view width, visibility up to 150M, utilization of high-brightness comb lens, offers super brightness for you But not dazzling, all clearly visible for night no matter rain or fog. IPX6 waterproof: IPX6 waterproof and dustproof, water spray from any direction will not enter the light even in big raining. Usb rechargeable: 20 hours Run time. Comes with a USB cord that charges form your computer, wall charger, power bank or any other device with a USB port. Material: PC plastic Product list: taillight * 1, headlight strap * 1, USB cable * 1, packaging box * 1. Brightness: 10 lumens Battery life: about 5 hours in high-light gear, about 10 hours in low-light gear, about 12 hours in fast-flash gear, about 20 hours in slow-flash gear, and about 32 hours in warning gear. 5 modes to switch: slow flash - fast flash - warning light - highlight 100% - low volume 50%. Warm NOTE: Christmas is coming and we will include a Christmas card that you can give to your friends or family as a Christmas giftBy the way: Merry Christmas