The Lenovo H203 Bluetooth Sports Neckband Earphone Black has Bluetooth 5.0 technology, for stereo sound, good bass, crystal clear, and stability; with a built-in Mic for hands-free phone calls. Built-in large capacity battery to ensure long time use, 10 hours playtime, no need to worry about power shortage. Magnetic Design conveniently and securely hangs the earbuds around your neck when you're not using them. Not easy to lose. Stable Neckband, flexible for easy storage and adds stability to the earbuds when playing intensive sports