The Proviz LED armband is unisex and adjustable to fit all sizes. It is brand new for this season and it gives a much increased light output thanks to two compact CR2032 batteries (replaceable) that power two super strong LED lights situated on each end of a super-flexible silicon tube causing the whole tube to glow brightly to help ensure your visibility at night. It utilises an elastic strap with velcro hook and loop fastening system to fit almost all sizes. The Proviz LED armband can be used for a variety of night time activities including cycling, running, walking and can also be attached to your pet's collar. It is weatherproof and easy to care for and is CE and RohS approved.Key Features:As featured in Runner's World ''Best Gifts for Runners''As featured in Running Fitness '3 of the Best Running Lights'Two light modes: Constant / Flash Over48 hours of continuous battery lifeBattery type: 2 * CR2032 (batteries included)Size: Silicon light panel = 19cm + 20cmAdjustable elastic strap with velcro fasteningUses: Cycling, running, walking, dog-walking, hiking and more.Weatherproof