Bluetooth Headphones, QY19 Sweatproof V4.1 Wireless Bluetooth Earbuds Sport Earphones Hands-Free Stereo Headset for Running, Sports & Exercise with Microphone for iPhone 7/7 Plus Samsung LG (Black) 1. Advanced Bluetooth 4.1 + CSR8645 Chipset + APT-X audio decode technology. More energy efficiency, steady Bluetooth signal and less delay, it's twice times stronger than the common one, plus pure CD-like quality sound that's on par with wired headset. To bring you a HD lossless music enjoyment. 2. Mini Lightweight + Sweatproof design for sports. Only 12.7g, lighter than QY7 QY8 QY11. Snug and secure medical grade silicone ear gels provide you a most comfortable wearing earbuds full day. The invisible nano-coating technology more effectively makes earbuds to withstand the intense heat and sweat during running, jogging, gym, exercise, workouts, fitness or other activities. 3. CVC 6.0 noise cancellation technology reduces outside noises, the built-in HD microphone with noise cancellation also let you get high quality, clear calling and friends chatting. 4. Enjoy about 6 hours of premium quality talk/play time (full charge in around 1-2 hours); experience crystal clear sound and rich bass for your music. Supporting 33ft (10meters) working range. Compatible with 99% of all Bluetooth-enabled devices, allows pairing with 2 cell phones or tablets simultaneously. 5. 1 Year Worry-free Warranty. Comes with 2 pairs of Closed Ear-Tips for music, 3 pairs of sports Ear-Tips, 3 pairs of Flexible Ear-Hooks. 45 days money-back & 1 year worry-free warranty, and friendly customer service.