BP-eWing Bluetooth 4.1 Earbuds with Microphone Neck-Strap Sweatproof , Stereo Bass and Easy to Pair Wireless Sports Headphones QUALITY STEREO SOUND---The sounds are rich and warm. Great noise cancelling ability that allows you to be fully immersed in the music BUILT-IN MICROPHONE--- BP-eWing wireless sports earbuds with built-in microphone for phone calls when you are doing excises or outdoor activities LIGHTWEIGT AND COMFORTABLE.--- Designed with the back strap feature.Fits perfectly to your ear .Suitable for Sports and Exercise. GOOD BATTERY --- Up to 4-6 hours talking/ playing time.Do not let your misic stop. Easy and fast to pair with smartphones, tablets and other Bluetooth enabled music devices.