Blackburn Click USB Rear Light Rear BlackThe Blackburn Click USB Rear Light is a fantastic way to let traffic and other cyclists know that you are up ahead. There is an LED charge indicator that lets you know when you need a recharge. Plug your cable right into your USB port, charges in 3 hours. These 20 lumen lights have two settings: high and strobe. The high setting lasts for an hour and a half, while the strobe setting lasts three hours. Meets ANSI FL-1 Standard. These fit diameters from 15-35mm. There is an extra space on the sides for the light to bleed out to increase your overall visibility. Uses a Lithium Polymer Battery. Waterproof up to 1 meter by IP-65 standard. Weighs only 20 grams. Available in Black, White, Red, Blue, Orange, and Hi Vis Yellow.768686731105