Bluetooth 4.0 Wireless Sport HD Earphones Sweatproof Running Gym Exercise Earbuds - Hands-free Calling Headsets with Microphone and High-fidelity Stereo Sound Minimum background noise, Pure enjoyment: CVC Noise Cancellation 6.0 technology intelligently reduces ambient and white noises, delivers you a clean audio experience with impressive super bass. Strong Wireless Signal: Latest Bluetooth 4.0 technology allows you to sync and pair within seconds for high-fidelity stereo music and clear speech within 10-meter working distance. Stable Connection: Unique around-the-neck headset with stable ear-fitting design, which is lightweight, sweat-proof and ergonomic, enhances your comfort for all exercises. Simple-to-use: Functions both as audio streaming headphones and hands-free telephone communication device, this simple user-friendly interface with volume and channel controls directly on the unit allows you to enjoy the incredibly wireless freedom. Feel snug in ears: Mouselemur provides alternative rubber stabilizers and three different-size bud tips to suit different ear sizes.