Coquimbo Safety Light for Runners Bikes Dogs Kids Boats,3 Modes Bike Tail Lights, Clip Warning Light with Velcro Straps, Best LED Lights for Running, Walking, Jogging (one pack) NEW AND IMPROVED : Slim, lightweight, and super bright, with 3 light modes:constant, slow strobe and fast strobe. Powered by two coin batteries (Built-in battery), lasting up to 70 hours (constant mode) or 96 hours (strobe modes). EASY TO USE: Works right out of the box and comes preinstalled with batteries. Simple one touch power switch, clips easily onto your belt, pocket, backpack, helmet, armband, or clothing. COMPACT AND WATER RESISTANT: Safety Light for Runners come with Clip conveniently portable, durable, and reliable; take it with you while doing any outdoor activity in the rain, snow, or other weather conditions. EXCEPTIONAL VALUE: Includes one safety light with batteries, and one Velcro straps to easily mount on bikes, strollers, ankles, wrists, arms, canes, wheelchairs, pets collars, and more. CUSTOMER SATISFACTION GUARANTEE: If you are not 100% satisfy with the purchase for any reason, don't hesitate to contact us to request a refund or replacement.