MOTOROLA Buds SF500 Black Universal Bluetooth Stereo Headset A lightweight, innovative design lets you wear for hours without fatigue and Ear stems naturally reposition themselves to fit you perfectly Voice prompts Inform you when you're muted, when you've successfully paired and more Premium HD audio and noise cancellation Up to 11 hours of Battery Time - Up to 8 days of standby time. Control volume and pick up calls Automatically pause music when you receive an incoming call, go back to music when you hang up