The Cateye Rapid Micro is specifically designed for minimalists and offers 4 modes of eye-catching illumination. Rechargeable Li-ion batteryUSB rechargeableLighting mode memory functionRecharge time: approx. 2hrs (USB 2.0)Approx. weight: 31gThe Micro s lightness, at only 31 grams, confirms that extra weight and bulk are no longer an excuse for not being seen. This light has all the features of its big brothers Rapid X and X2, including low battery indicator, battery auto save and mode memory. The Rapid Micro may be small in size but it s big on safety.