Poweradd LED Lights Sports Armband [3 Modes LED] for Running and workout - Water Resistant, Key Holder, Dual Adjustable Slots, Perfectly Fit for iphone 6,6S(4.7"), Samsung Galaxy S5,S6,S6 edge(5.1") Smart Design: 3 Flashing Modes of operation at the touch of a button, Steady light, Fast flashing or Slow flashing. These Bright LED help increase visibility in Low-Light Environments. Multi-function: Armband includes a Reflective sliver trim and LED light for safe running at night. Built-in a Key Holder for storing your key while exercising. Perfectly fit for small or large arms. Water resistant and can keep sweat away. Hingh Quality Material: made of lightweight and comfortable soft neoperenevery .It's made to twist and bend but not stretch out of shape. Clean easily and dry quickly. Water resistant and can keep sweat away. Compatibility sizes: Poweradd Double Adjustable Armband will fit Any Arm Size Up to 15", perfectly fit iphone 6s/6(4.7"), Samsung Galaxy S6/S6 edge/S5(5.1"), any phone that has A Screen up to 5.1". Touch screen compatible: Enjoy full use of your phone through the protective screen cover on the armband, retain full touch screen functionality, you are free to enjoy music and generally use your phone as easily as you would without a case.