Mpow Cheetah Bluetooth 4.1 Wireless Sweatproof Sport Headphones with aptx MPOW Brand Certified: Top-Brand Bluetooth Accessories for Smartphones Cheetah's Stylish Behind-Ear Streamline Outlook Design Guarantee 100% Stable and Comfortable User Wearing Experience for Running,Jogging,Biking,Driving,Fishing,Camping,Hiking and other Outdoor Sports. The Most Advanced Bluetooth 4.1 Chips Hardware Configuration Ensure Hi-Fi CD Quality Stereo Music Sound and Strong Signal. Leading apt-X Tech Can Provide No-lag Voice when Listening to Music or Calling with Mic. Simple To Use: Portable Function Control Buttons Are Designed for Easily Operation. Just Press it untill Blue and Red LED Light Alternatively Flashing, find and connect with your phones,then you can enjoy music or calling wirelessly. If need reconnect automatically, please turn on bluetooth of your phone first, then turn on the Cheetah, It can reconnect automatically. Universal Compatible for Apple iPhone 6 6 Plus 5 5S 4 4S iPad iPod Samsung Galaxy S6 S5 S4 S3 LG Motorola Sony and iOS/Android Mobile Phones. Almost all smartphones can work with this well.