Mezzo Wireless On-Ear Headphones have a fast & ultra-stable True Wireless Stereo connection, featuring Auto-Pairing and Auto Power-On for easy use, with multi-function buttons & dual microphones for hands free operation. Double press the Vol/Next Track button to activate Siri iOS devices or Google Assistant Android devices, works as single or pair; and has power level indicator lights. Playtime: 4 hours on a single charge & up to 13 hours with charging case with Charging time: 1-1/2 hours for earbuds & power case. Includes micro USB cable and is FCC certified.