40MM Drivers for clear audio: Crystal clear audio, without discomfort! Experience your music the way it was meant to be heard. Long-Lasting Battery Life 20H: Designed with a large capacity rechargeable battery, capable of delivering up to 20 hours of music playback. All Control is within grasp: Easy control the headphones with the touch area beneath the right ear cup. Dual Mode Connectivity: Built-in Microphone 20H Long-lasting battery life