Drawing on extensive research and development,Lenovo HE05 Original Wireless Bluetooth 5.0 Stereo Magnetic Neckband bluetooth headphone features HD stereo sound with high definition and unparalleled rock-solid richer bass. With dual 11mm dynamic woofers, the neckband headset provides the crystal clear bass sound and better listening experience for intensified workouts.Built-in Mic & volume controls enable hands-free calling and adjust your music ,even in workout.