Bike Safety Lights are the safe and convenient way to illuminate your bike. The bike safety lights are visible at a distance of up to 1 mile and comes with a convenient bungee cord to attach the light to your seat post, handlebars or bike frame. The front and rear safety light have two settings; steady and flashing. The bike safety lights require two CR 2032 replaceable lithium batteries (included). The bike safety light has a long-lasting LED light rated at 100,000 hrs. of use.