2pcs/Lot Silicone Bike Bicycle Cycling Head Front Rear Wheel LED Flash Light Lamp L0714 P Use waterproof silicone material of high elasticity. It's very strong, durable and extend Four Kinds of switch:full light, flash, slow flash, off,according to your actual needs can switch quickly. Water resistant shower proof design - is not afraid of rain flooding. Installation or removal without any tools you can get 11 seconds. strong.