SumacLife Running Sports Armband Case Pouch for Blackberry Z 10 / Q 10 (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