BSEEN 1 Pack for 2 PCS LED Armband, Running armabnd, led Bracelet Glow in The Dark-Safety Running Gear.Use TWO bands in one pack.Pay 1 get 2.Resonable price for DOUBLE safety. Adjustable for ANY SIZE: The elastic bands make it easy to adjust for a loose or snug fit. EXTRA BATTERIES INCLUD: Take the CR2032 or CR2016 battery. Long battery life,50-70 hours. SUPER bright, Comfortable,Soft,Easy to use, User friendly, real well thought out design and Multi-function.Apply to Children,Adult and Pet. 100% Guaranteed for 1 year.See MORE in product description.