Touch Control Earbud Design, Multifunctional Touch for controlling power, standby, answer calls, hang up, listen to music, etc. Excellent sound quality, 3D surround sound, and dual-cavity sound holes. Portable charging case and long battery life. The portable charging case with a rechargeable battery can recharge your earbuds 4 times. Charging time of 1 to 2 hours allows for 5-6 hours of music playback. Noise-cancellation technology reduces ambient noise and echo, providing clear sound during calls or music playback. 5.0V Powerful microphone. Transmission distance of 15 meters. Bluetooth 4.2 connectivity – compatible with all phones. Automatic pairing. Standby time: 100 hours.