Ascher USB Rechargeable Bike Light Set,Super Bright Front Headlight and Rear LED Bicycle Light,

650mah Lithium Battery, 4 Light Mode Options. 2 USB cables and 4 Straps Included. The Headlight and Taillight feature a one-touch switch with four different lighting modes depending on your preference. Include full brightness, half brightness, fast flashing and slow flashing.  https://www.amazon.com/gp/product/B01EUQ7ZQG/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=wellnesswo022-20&creative=9325&linkCode=as2&creativeASIN=B01EUQ7ZQG&linkId=e1db1418e1b8377d4f0fd4bff1852596