Wireless Bluetooth Earbuds,AELEC V4.1 Water Resistant Sweatproof Sport Headphones Noise Cancelling Earphones with Microphone for Running Workout Water Resistant + Sweatproof : IPX4 level water resistant, built with Aluminum shell. Great for sport and daily life, such as outdoor sport, hiking, cycling, jogging, walking, working. CSR bluetooth 4.1 version compatible with most of bluetooth devices, such as for iPhone 6 6s 5 5s,Samsung Galaxy,iPad,iPod,smart phone,tablet etc. Super signal design support operation within 10m! Double battery: standby time up to 350 hours. The battery lifespan is also longer than other normal bluetooth headphone. User-friendly design with multi Paring and NFC touching function. Connect with two mobiles simultaneously so that you never miss a call.If your mobile with NFC function, you can easily connect it with the headphone by touching each other. High-fidelity APT-X audio technology and CVC6.0 super noise cancellation technology! Enjoy high quality music during your spot time and leisure time. Built-in microphone to answer calls hands-free. All aelec products come with life-time hassel-free warranty, along with friendly customer service.