IPX6 WATERPROOF WIRELESS SPORT HEADPHONE:IPX6 waterproof nano coating can effectively protect the headphones from sweats. The neck belt design of wireless sport headphone is no wire winding, which ensures a more perfect service life when doing sports, running, hiking, yoga, fitness, travelling. TRUE HD HIGH FIDELITY SOUND:The real HD high fidelity voice adopts the latest Bluetooth 4.1 CSR technology and the EDR stereo sound effect, the wireless sport headphones can produce incredible sound quality with bass and clear treble. This wireless sport headphone have the best wireless earphones, input microphone and caller voice notifications. ENHANCED WEARING COMFORT:we have improved the hardness of the ear loop and provide 3 packs of soft rubber earplugs in different size for not only adults but also children.