Oxi Hands-Free Bluetooth Headset &ndash; Noise-Cancelling Over Ear Headphones with Built-In Microphone &ndash; Lightweight, Adjustable Comfort Ideal for Traveling, Work Calls, Trucking and Construction Work HANDS FREE BLUETOOTH  Connect the Oxi Bluetooth Headset to your smartphone, tablet, laptop or vehicle SYNC function for seamless Skype calling, phone calls while traveling, or even home video gaming use. ENHANCED NOISE CANCELLATION  Not only can you enjoy HD-quality calling with crystal-clear voice communication, our headphones are made to block out loud noises and sound for better information relay. ADJUSTABLE COMFORT  Featuring swivel-cushioned ear pieces, and adjustable band and a flexible boom mic, you can wear the Oxi headset for hours without it feeling uncomfortable or causing you to sweat. EXTENDED TALK TIME  The battery life on this headset lasts up to an amazing 21 hours with up to 250 hours of standby time. And the touch-button calling, redialing and volume features make it easy to use for hours at a time. VERSATILE CONNECTIVITY  Each headset connects to up to two other Bluetooth devices simultaneously, allowing you to connect to speakers, your car, your phone or other important mobile devices for multiple needs.