AGPtek&reg; 6 Pcs Bike Bicycle Cycling Tyre Wheel Spoke LED Light Lamp (Multi-color) Solid, durable, extends strong, multi fixation. 3 Kinds of switch: Full light, Fast flash, Flash. Water resistant shower proof design - is not afraid of rain flooding. Install or remove without any tools you can get 3 seconds; One-Touch switch design, easy operation. Power by:"Cr-2032"battery x 1(Included)