Konsait [New Version] Update Wireless Bluetooth 4.0 Headphones W/Microphone Noise Cancelling Hands-Free Calling Sports/Running / Gym/Exercise/ Sweatproof Bluetooth Stereo Earbuds Headset Earphones Bluetooth 4.0 technology,the signal strength is nearly twice times than the general bluetooth headset in the market. Awesome portable and lightweight wireless headset can be stay in your ears comfortablely Adopt the most advanced bluetooth CVC6.0 noise cancellation, it can accurately distinguish the difference between voice communication and noise,and judge it intelligently through the transmission between different decible and reduce noise decibels.Which makes you enjoy a clear sound even through you are in a noisy environment. Pairing is pretty intuitive and will pair with all mobile phone except the phone dont have bluetooth function,Built-in rechargeable Grade A polymer 80mAh battery lasts close to 4-5 hours talking/music time, makes you do not worry the bluetooth device out of juice in your daily life HD stereo is more delicate than standard-definition sound, no matter ther high pitch ,bass or treble accent,it can presented perfectly.Built-in HD microphone,makes you enjoy a clear and loud sound.Play/pause (also answer calls), Vol +/-, and next/previous track buttons, super easy operation, good workmanship. Only need to pair once and easy to pair, beeps when it is running low