No wires, no distractions, just music The WH-CH700N Wireless Noise Cancelling Headphones are made for long listening on the move. One Push Artificial Intelligence Noise Cancelling (AINC) adjusts to your environment, so you can eliminate unwanted noise as you travel. The WH-CH700N Wireless Noise Cancelling Headphones are made for long listening on the move. One Push Artificial Intelligence Noise Cancelling (AINC) adjusts to your environment so you can eliminate unwanted noise as you travel. Noise cancellation adjusts to your environment with One Push AINC Wireless BLUETOOTH® streaming with NFC™ One-touch Long lasting listening with up to 35 hours of battery and Quick Charging Hear more detail with 40mm Driver Unit Smartphone compatibility for hands free calls and use with your voice assistant WEIGHT Approx. 240g General Features HEADPHONE TYPE Closed, Dynamic DRIVER UNIT 40mm, Dome MAGNET Neodymium IMPEDANCE (OHM) 22ohm (when connecting via the headphone cable with the unit turned on) , 48ohm (at 1kHz) (when connecting via the headphone cable with the unit turned off) **Lightly Used