Hook and loop straps allow light to be easily mounted to all shapes and sizes of handlebars, headtubes, seat posts, hubs, helmets and more. Up to 100 hours run time on one replaceable CR 2032 battery (included). Spok Headlight: Hooded beam keeps light out of the cyclist’s eyes. Nichia eXtreme 2.0 LED. Flashing and steady modes. Lumens: 6. Wt: 16 g (with battery). White.|Spok Tail Light: 1 LED provides visibility up to one mile. Translucent case allows for 220° of visibility. Red.