Hoppic Wireless Bluetooth Noise Cancelling Headphones with Ear Hook - Black MINI Sports BLUETOOTH V4.1 version, professional audio field provides high quality audio output, feel the beauty of wireless music. REAL VOICE CONTROL: sayYES to answer call and sayNO to reject it when phone calls comes. CHINESE AND ENGLISH -voice switch, voice message when you have an incoming call Transmission distance and range: WORKING RANGE UP TO 32.8 feet(10 meters) SUPER-strong SMART VOICE REDUCTION design, far from the madding crowd, enjoy the musice with quiet, belongs to your own world.