Yes, the Sony WH-CH710N headphones have a built-in microphone that allows for hands-free calling and voice assistant commands. The microphone is located on the earcup and is designed to pick up your voice clearly, even in noisy environments. With the microphone, you can easily take calls while wearing the headphones, without needing to take them off or use a separate headset. The voice quality through the microphone is generally clear and reliable, making the Sony WH-CH710N headphones a versatile option for both music and phone calls.