E-TRENDS Bluetooth 4.0 Wireless Sport Headphones Sweatproof Running Gym Exercise Bluetooth Stereo Earbuds Earphones Headsets with High-fidelity Stereo Sound for iOS, Android and More (White) The latest version Bluetooth V4.0, the new signal connection technology, with over 10 meters of transmission distance, signal stability, robust transmission, allow you do whatever you want in a broader space. Echo cancellation and noise cancellation technology, professional noise reduction design shut out the voice of noise and make the clear voice smoothly passed to your ears. Crystal Clear Sound Quality - CSR Bluetooth 4.1 chipset and Apt-X technology to ensure higher sound quality with no transmission delays. Exercise-proof & Sweatproof design guarantee 100% Stable and Comfortable when exercising, running, climbing, driving, skating,camping, fishing and other outdoor sports. IOS system power display, simultaneous pairing of two devices, intelligent voice prompts, low radiation, rich functionality and configuration is the foundation for a better user experience.