Jabra Extreme Bluetooth Headset for PC with Skype Certification [Retail Packaging] Noise Blackout Extreme Technology with 2 Noise-Cancellation Microphones Crystal Clear Sound By Advanced Dsp Technology Intelligent Volume Control & Audio Shock Protection High Performance with Bluetooth 2.1 Edr & Esco Bluetooth headset for use with PC and mobile phone--can connect to both simultaneously Skype Certification guarantees compatibility and high quality sound Noise Blackout technology for crystal clear calls; plug'n'play USB adapter ensures that no installation is needed All day comfort with Ultimate-fit Eargels and ear hook Up to 5.5 hours of talk time, up to 250 hours (10.5 days) of standby time; released in October, 2010