Naztech i9 Wireless Active Noise Cancelling 4.1 Bluetooth Headphones with in-line Microphone Up to 30 hrs Playtime for iPhones, Smartphones, Tablets, Computers, TV & Work/Airplane Adapter Included Professional Headphones: The best HD sound quality with memory foam, genuine leather ear cups and an extended battery life. HD sound with enhanced bass: the 40mm neodymium drivers provide the ultimate HD sound Professional Headphones: The best hd sound quality with memory foam, genuine leather ear cups and an extended battery life. Active Noise Cancelling: featuring noisehush technology, these headphones reduce distracting ambient noise to a hum with active noise cancelling. Extended Battery: lithium-ion battery provides Battery Time - (Bluetooth Only): 15 hours, (Noise Cancelling Only): 30 hours, (Bluetooth + Noise Cancelling): 12 hours Built-in microphone: built-in wind-resistant noise cancelling microphone makes sure your device comes through as crisply and clearly as possible