ADVANCED TECHNOLOGY & QUICK PAIRING SPEED: Newest Version Bluetooth 4.2 CSR technology and ergonomically shaped providing you comfortable and amazing experience, perfect for morning running and jogging, hiking, fitness and other exercises. It always stays stable and makes you feel comfortable. HIGH DEFINITION SOUND QUALITY: Advanced CVC 6.0 noise reduction tech and superb bass, richer and crisp sound, enjoy the authentic music wherever you want with Wsky Sport Wireless Bluetooth Earphones. HANDS-FREE CALLING & LONGER PLAYING TIME: The microphone is integrated allowing you to receive calls while listening to music with your hands-free. Improved 11 hours playtime with regular volume. Superior quick charge of only 1.5 hours, the bluetooth wireless earphone can be fully charged. COMFORTABLE AND ENHANCED TOUCH: Lightweight design and Hooks around give anyone comfortable fit.Three different eartips you could choose to wear, find the most perfect fit eartips to block out external noise and provide a superior audio experience with enhanced bass.