Blackburn Click USB Light

It's the perfect small LED flashing (and constant) light. Clicks on and off by pushing on the lens. Wraps around tubes, bars, and seatposts with silicon straps. Light. Bright. 20 lumens. Micro-USB rechargeable. Fits diameters 15-35mm. Excellent side visibility. LED charge indicator. Lithium polymer battery. Waterproof to IP-65. 20 grams.