Sport Outdoor NFC Wireless Headphones KAYSION Bluetooth 4.1 Stereo Earbuds Earphone with APT-X, Mic Handsfree Calling for any Bluetooth enabled devices Enhanced Technology: upgraded from Bluetooth 4.0 to advanced Bluetooth 4.1 with CSR8645 chip and APTX codec. Uniquely designed and adopted high quality medical environmental materials. Comfortable and stable to wear for all levels of exercise. Make easy accessible on-ear controls when you keep moving. Enjoy yourself at a good distance without any limitations or signal interference. Clearer sound quality of music and phone calls with CVC6.0 Digital Noise Reduction Technology.Secure and swift NFC function:suitable for iPhone 6 and other NFC devices. Compatible with but not limited to iPhone 6,6 Plus,5S 5C 5 4S 4, iPods, Samsung Galaxy Note 3, Note 2, S5 S4, S3, S2 Most Android Smart Phones and other Bluetooth-enabled tablets. It can connect to two cellphones simultaneously. Only need to pair once and easy to pair.