Qooltek A Pair of Alloy Bike Bicycle Handlebar Handle Bar End Plug LED Lamp Safety Safe Bike Flashing Light Cycling Warning Flashlight with 2 Lighting Modes (Red) Multi-function: Safety light for cycling sports especially at dawn, dusk, night or rainy days. Easy to use:Fixed in your bike handlebar, just press the button to turn on/off the light. Super bright with 2 modes: Steady and Strobe. Increase road safety and make your bicycle cool when driving at night. Durable & Widely visible angle : It is made of metal, durable to use. 270 degrees wide viewing angle, visible within 20 meters. It is suitable for the tubes which diameter is between 16-23mm, external diameter is 25.2mm.