Stream from any Bluetooth device or use the built-in microphone. Integrated One button allows Bluetooth connectivity. LED indicator . Charging time: approximately 1.5 hour. Playback time: approximately 2 hours. Carry case has a built-in lithium battery that charges with the included micro USB (700mAh). Carry case charges the earbuds which include (30mAh) lithium ion batteries. Bluetooth distance of 30 feet. Compatible with iOS voice assistant.