Wydan Case for Samsung Galaxy S4 Active i537 - Neoprene Adjustable Gym Workout Arm Band - Neon Green (Medium) w/Wydan Stylus Pen Designed specifically for the Samsung Galaxy S4 Active i537. Designed to perfectly fit your phone and allows full access to all ports, buttons and features of your phone. It is user-friendly, and super easy to install. All openings are precisely cut to allow full access to all the wireless device functions - the dock connector, charger, side buttons, speaker, microphone and camera. Wydan stylus pen is included.