Bass-Boosted Stereo Audio: The Trending M90 Wireless Bluetooth Sports Earphone delivers an immersive audio experience with bass-boosted stereo sound. Feel the beats and enjoy your favorite music like never before. Wireless Bluetooth Connectivity: Connect effortlessly to your devices with wireless Bluetooth technology. Say goodbye to tangled wires and enjoy the freedom of movement during workouts, runs, or any active lifestyle activity. Built-in Microphone for Hands-Free Calls: Stay connected on the go with the built-in microphone. Take calls without interrupting your workout, and enjoy crystal-clear communication with the M90 Sports Earphone.