The Author Quantum 700 lm is a USB rechargeable headlight with a massive 700 lumens output. This light features 4 modes take you from the bike lane to the trail. The Author Quantum 700 lm is equipped with the newest lens techniques. All of them are fixed in the alloy case and are optimized to maximize the light output, light beam and the lumen efficiency. The beams are projected in a wide range, not in a straight line only. Highly practical feature is the LED battery capacity / charging indicator which is integrated in alloy case, this will help you stay aware of your battery life so that you can change modes and charge accordingly so that you don’t lose light while on the go. LED CREE XM-L2 LED 700 lm. The light comes with 4 different light modes for different light conditions or for different battery life. Full Power (700 lm - 3,5h) / 30% power (210 lm – 10h) / Flashing (700 lm – 8h) / Contour LED ( 80 h). 4 blue LED capacity indicator ( 4 LEDs = 100 – 70%, 3 LEDs = 69 – 50 %, 2 LEDs = 49 – 20%, 1 LED = 19 – 0% recharge it). Battery pack LI-ion / 3,7 V / 2600 mAh. Charging time aprox. 4 hrs (5V/1,5A charger). Recommended discharging / charging period – minimum 1x / 6 months. Charging cable included (USB A / Micro-B). The silicone mount fits any sized tube with a diameter of 22-35 mm even the unround profiles. Helmet mount bracket with universal velcro strap fixation. Size d.35x95 mm / Weight 109 g. ↓↓↓# light rechargeable # USBwhere to buyaccessoriesother views Photogalleryphotogalleryvideogalleryproduct optionsaccessories Photogallery Videogallery Product options black = UA#12002342 accessoriesAUTHOR Bracket A-Light X1Universal bracket for the light Author Solaris 300 and Quantum 700.