A daytime running light is the easiest and best way to keep riders safe and visible. The Ion 200 RT provides the proven safety of a daytime running light in a compact and powerful USB rechargeable package, and it features a distinctive flash pattern that's visible from up to 2km away. Ion 200 RT Front Bike Light Features Specifically designed focus, flash, and range offer ultimate daytime visibility 200 lumens via high-power CREE LED Integrated light sensor auto-adjusts brightness to your environment 200LM-1.5hrs, 100LM-3hrs,5LM-14.5hrs, Night Flash-30hrs, Day Flash-12hrs Easily attaches to your handlebars, helmet, or bike mount Blendr compatible for simple, secure attachment to compatible stems and helmets Connect with compatible ANT+ devices for always-on, battery status, and wireless control Includes Ion 200 RT, front Quick Connect bracket, and Micro USB charging cable