YYGIFT Bluetooth 4.0 Wireless Stereo Noise Cancelling Headphones Jogger Running Sport Sweatproof Headphones Earbuds Earphone Headset with AptX,Mic Hands-free Calling for Apple iPhone and Other Android Cell Phones - Green Csr4.0 bluetooth version ,earbuds seal with unique cavity structure design, helping you enjoy a pleasant music journey . 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 . Eliminates noise and provides a clean audio pure enjoyment for you. Great for outdoor travellers,exercisers,drivers and so on .