F4 Flexible Power Bank footwear Four LEDs form the base Kleur:Everglade Four LEDs form the base of the lamp one Maxbright white and three Ultrabright red Lumen: 1000 Batteries: 1 x 16340 (included) or 1 x CR123 (not included) Length: 95 mm Weight: 80 g Shipping weight: 120 g Established in 2007 Great designs and manufacturing standards gain them German iF Design Award