Bluetooth Headphones, Hicool M7 Wireless Sport Stereo Earphones, Noise Cancelling Sweatproof Headset Bluetooth 4.1 Technology: Powerful audio decoding system gives you strong performance and makes music more sense of space, delivering remarkable sound Perfect Sound Quality: High definition stereo noise cancellation reduces the loss of sound, eliminating the surrounding noise, making the bass deeper Anti-perspiration Design: The ABS and PC material blocks your sweat trouble, preventing the headphones from damaging; Unlimited music, endless sport Strong Compatibility: Perfectly compatible with all kinds of digital products; As long as you have bluetooth enabled devices, you could connect it Comfotable Fit, Enjoyable Listening: Lightweight and ergonomic design, 10-meter working distance offers you hours of pure enjoyment through all sport