This dedicated app increases the convenience of using supported Audio-Technica products. In addition to making Bluetooth products easy to use, even for first-time users, the app also allows users to customize the headphones' volume control and operation patterns as desired. Main features : - Operating guide for stress-free use of Bluetooth products - In-use status information display, including battery level and mode status - Customizable equalizer and volume step setting - Button and touch-sensor operation adjustment to accommodate your dominant hand or other preferences *Available features vary depending on the product. Supported products : ATH-TWX7, ATH-SQ1TW2, ATH-WB2022, ATH-CKS30TW, ATH-TWX9, ATH-CKS50TW, ATH-M50xBT2, ATH-ANC300TW, ATH-CKR700BT, ATH-CKS5TW, ATH-CKR7TW, ATH-SPORT7TW, ATH-ANC900BT, ATH-SR50BT, ATH-M50xBT, AT-SBS70BT, AT-SBS50BT Includes products that are not sold in some countries or regions. Some features and services may not be available depending on the country or region. This app may become unusable without prior notice due to Android OS updates. Please be aware of this in advance. --- The Bluetooth® word mark and logos are owned by Bluetooth SIG, Inc. and any use of such marks by Audio-Technica Corporation is under license. All other trademarks are property of their respective owners.