Maxtronic QY8 V4.1 Wireless Bluetooth Headphones Noise Isolating with Microphone Sweatproof Flat Cord Mini Lightweight Heavy Bass in-Ear Stereo Wireless Bluetooth Earbuds Headset Earphone Maxtronic QY8 is equipped with Bluetooth 4.1 + EDR APT-X audio decode technology, offering you perfect stereo sound Good noise isolation to create the optimal environment for listening to your favorite tunes, built-in microphone with noise cancellation for clear calling and friends chatting.Please note that noise cancellation only effect the other people you are calling to. Long battery life: Built-in high performance polymer 80mAh battery, 5 hours talking/playing time, and about 175 hours standby time. High-fidelity stereo music and clear speech, You can begin enjoying CD quality stereo sound instantly Simple-to-use: control all functions of your music (volume, sound, song selection) and calls from your phone via our simple-to-use user interface on the headphones themselves.