It easily attaches to the seatpost with the elastic silicone band.
7(V), 2.The light is equipped with three LED’s, one super bright to make the cyclists visible from far and two bright LED’s for comfortable side vision. Bookman Curve Taillight Bookman Curve Rechargeable taillight with a brightness of up 37 lumen and a run-time of up to 32 hours. The completely weather resistant light (IP-44) will show you the way through rain, hail or snow.