PreSonus Eris HD10BT Circumaural Bluetooth Headphone with Active Noise Canceling.Closed-back Circumaural Headphones with Wireless Bluetooth Operation, Active Noise Canceling, and Built-in Microphone. The Eris HD10BT noise-canceling headphones from PreSonus eliminate the need to choose between superior sound reproduction and price. These professional quality headphones go where you go and have features that make them even more flexible. These headphones are battery operated, are equipped with Bluetooth connectivity, and have an onboard microphone that answers phone calls at the touch of a single button. Music fanatics here at Sweetwater love these headphones because they create a wide frequency response while providing 18dB of much-appreciated isolation. Offering up expansive audio response, Bluetooth connectivity, and a folding design, the PreSonus Eris HD10BT noise-canceling headphones are a great choice for any musician on the go. 16 hours of rechargeable time What's in the box 1 x hd10 bt headphones, 1 x Micro USB charging cable 1 x Hardshell case included with purchase