Developer's DescriptionBy O&P TECHNOLOGY CORPORATIONThe Pioneer Headphone App is a smartphone application that enables you to easily and quickly check and alter various settings on compatible...The Pioneer Headphone App is a smartphone application that enables you to easily and quickly check and alter various settings on compatible Pioneer headphones.The connection guide offers support on how to use the Bluetooth connectivity on headphones in association with your smartphone.You can quickly and easily check and alter the settings of headphones, noise cancelling, etc. via your smartphone.You can also check how to use your headphones.Compatible modelS9 wireless noise cancelling (SE-MS9BN)- Please note* All models require a firmware update to use the Pioneer Headphone App.* Please turn on device location. To find nearby products.