To be able to adjust the settings of the earbuds to your individual needs and to fully use all functions of the earbuds, you require the free Sennheiser Smart Control app on your smartphone.
Download the app from the Apple App Store or from Google Play and install it on your smartphone.
–Google Play Store: click
–Apple App Store: click
Alternatively, you can use your smartphone to scan the following QR code or to call up the following Internet site:
www.sennheiser-hearing.com/smartcontrol
Connect your smartphone to the earbuds using Bluetooth (see page > Connecting the earbuds to Bluetooth devices).
Start the Smart Control app.
Follow the instructions in the app.