For the MOMENTUM 4 Wireless headphones, find the transducer size, maximum battery life, and fast-charging capability (listening hours from 10 minutes charge). Then, verify if the Sennheiser Smart Control App is available for both iOS and Android, and state where to find the app download links.
Navigate to the MOMENTUM 4 Wireless product page on sennheiser-hearing.com. Scroll down to the 'Features' section to find the transducer size, maximum battery life, and fast-charging details. Click on the 'Support' link in the main navigation bar. On the Support page, locate the 'Sennheiser Smart Control App' section. Confirm the availability of the app on both iOS and Android platforms by looking for corresponding app store links or mentions.
State the transducer size for the MOMENTUM 4 Wireless headphones is 42mm. State the maximum battery life is up to 60 hours. State the fast-charging capability provides 6 hours listening in just 10 minutes. Confirm that the Sennheiser Smart Control App is available on both iOS and Android platforms. State that the app download links (e.g., App Store, Google Play) are found within the 'Sennheiser Smart Control App' section on the Support page.