<li>With crystal-clear sound and voice quality, ZuM Maestro Dual-Ear BT Headset delivers professional quality and keeps you connected</li><li> You'll be able to answer calls with any Bluetooth device like your smartphone or laptop with this comfortable, lightweight, high-quality headset</li><li> Bluetooth connection works with a distance of up to 33'</li><li> You'll have up to 21 hours of talk time on a single charge and 500 hours of standby time</li>