Wired. ANC Operates off 1 AAA Battery Carry case Like New! Enjoy your audio comfortably with the Sony MDR-10RNC headband headphones. The comfortable over-the-ear design lets you hear all of your favorite tunes. A wide frequency response of 24 Hz gives you sounds with amazing clarity. These headphones also feature dual sensors, effectively canceling up to 99.4% of unwanted noises, so you never have to deal with imperfect audio. These wired noise-canceling headphones offer up to 20 hours of active noise cancellation by using one AAA battery. Light and comfortable, these headphones are a good fit for many types of ear. This allows them to be given as a gift easily. With these Sony headphone headbands, the over-ear cups will drown out the noises of construction, conversation, or traffic.