SumacLife Workout Armband Case Pouch for Nokia Lumia Series Smartphones Window Phone (Black) Full screen protector allows full touch screen functionality Provide excellent protection during sport, such as running, biking, jogging, walking, working out etc. Adjustable Touch fastener arm strap. Arm strap dimensions: 11' - 16' in. Keeps device dry while being active with sweat proof feature. Compatible with:4-5 inch smartphones,Nokia Lumia 1020 , Lumia 920 ,925 , 928 , Lumia 820 , 720 ,620 , Lumia 900 ,Lumia 521 , 520 ,etc.