Bluetooth Headphones, Foneso V4.1 Wireless Sport In-Ear Sweat-proof Headset for iPhone 7 6 Samsung Galaxy and other Smartphones Unparalleled stereo sound quality: It features Bluetooth 4.1 + EDR APT-X audio decode technology which offers incredible sound quality with deep bass and crystal clear treble. Pair with any 2 Bluetooth devices simultaneously: Our Bluetooth speaker can pair with two different devices at the same time, this gives you double the possibilities for answering calls and streaming music to your workout headphones. Super Standby Time: With built-in 100mAh Rechargeable Lithium Polymer Battery, it supports approximately 10 hours of music playing Ergonomic and flexible In-ear design: soft smooth silicone gel surface have comfortable wearing without falling out. Headphones chip with Nano coating treatment have strongest sweatproof effect, perfect for running,gym,exercise, fitness,all outdoor sports. Noise Cancelling Technology to guarantee high quality sound and provides you clearer voice for calls. And a hands-free function would release your hands from answering the call during driving or walking. Foneso Bluetooth Headphones would be a great CHRISTMAS GIFT to your friends or loved one.