Aluratek ABH01F Bluetooth Stereo Headset with Built In Mic - Retail Packaging - Black ABH01F features hands free support for taking phone calls. Your headphones will alert you to an incoming call. ABH01F features simple on-ear controls. Easy to reach buttons makes it easy to change music tracks, adjust the volume and answer phone calls ABH01F features a built-in Lithium-ion rechargeable battery for up to 10 hours of continuous talk and music play and up to 100 hours of standby time on a full charge to free you from the hassle of frequent battery recharges. Rechargeable batteries built in