GoodBZ 2pcs Silicone Ultra Bright Waterproof LED Bike Cycling Bicycle Frog Light , White Flexible silicon body ultra bright LED,3 kinds of switch: full light, flash, slow flash Solid, durable, extend strong; up to 10,0000 hour of LED life Water resistant shower proof design - not afraid of rain flooding Install or remove without any tools,2 x CR2032 button cell batteries included Mounts to any bike quickly and easily by looping the strong silicone loop around the frame, and hooking to the light