Mpow Swift Bluetooth 4.0 Stereo Sweatproof Jogger, Running, Sport Headphones Earbuds with AptX,Mic Hands-free Calling-Fluorescence Green Bluetooth 4.0 with aptX codec, earbuds seal with unique Cavity Structure Design, 20% effective area increased in vibrating diaphragm, all of these helping you enjoy a pleasant music journey. Signal Enhance Technology: Using MPOW on your body without traditional limitations. Even put them in bag at the gym and workout at a good distance without signal droppage. Comfortable and stable design for all levels of exercise make easy accessible on-ear controls when you keep moving and eliminates troublesome wires tangling while you control your music or calls. Compatible with most Bluetooth-enabled cell phones; reduces noise, wind and echo. Perfect protection system: protected you against sweat and moisture damage.