Visible from up to 1 mile from 3 red LEDs; High powered 1/2 Watt LED, plus 2 further red LEDs; Up to 30 or 190 hours run time in constant or flashing modes using 2AAA batteries; Tough construction withstands extreme weather conditions; This handy rear safety light will ensure you stay visible when out at night, & is easily mounted to your bike. Used in flashing mode, this light is very good at attracting attention from other road users. :: Unisex > Bikes