Serenade Over-Ear Stereo Wireless Folding Headphones features multi-function buttons & microphone for hands free operation and perfect for virtual meetings! Double press the Power button button to activate Siri (iOS devices) or Google Assistant (Android devices). Headphones have power level indicator lights, 3.5mm aux port for non-Bluetooth plug-in capability, Playing time: 7 hours | Charging time: 2 hours and a connection range up to 33 feet. Includes micro USB cable. FCC certified.