The Lenovo Bluetooth in-ear Headphones with an in-line mic make crystal clear calls and take full control of your listening and voice experience that lets you switch seamlessly between music and calls. Listen in comfort with these wireless Bluetooth Headphones. The comfort-fit earbuds boast an ergonomic shape and a soft feel, while the wireless design uses bluetooth to connect to your compatible device. FeaturesSupports 10 hours of meeting or music playing time 100 hours of extra long standby time Crisp, clear audio for VoIP callsLight-weighted for comfort3-button remote with microphone allows you to easily control playback and make and receive hands-free phone callsUnique in-ear design comes with three Ear Gels and Shark FinsSpecificationsConnectivity Technology: WirelessWireless Technology: BluetoothWireless Operating Distance: 32.8 ftSound Mode: StereoImpedance: 32 OhmMinimum Frequency Response: 20 HzMaximum Frequency Response: 20 kHzSound Pressure Level: 110 dBConnectivity Technology: WirelessWireless Technology: BluetoothWireless Operating Distance: 32.8 ftSound Mode: StereoImpedance: 32 OhmMinimum Frequency Response: 20 HzMaximum Frequency Response: 20 kHzSound Pressure Level: 110 dBEarpiece Design: Earbud, Behind-the-neckEarpiece Type: BinauralMicrophone Design: On-cableMicrophone Technology: Omni-directionalIntegrated Microphone: YesColor: BlackForm Factor: In-earWeight: 0.35 lbs