Using your Focal Bathys headphones is a breeze. To start, charge the headphones fully. You can connect them wirelessly via Bluetooth 5.1 to your device. If you prefer a wired connection, use the 3.5mm jack or USB - C cable. Select the noise - cancelling mode that suits your situation: 'Silent' when traveling in noisy environments, or 'Soft' when you need to focus. The 'Transparency' mode can be activated when you want to hear the surrounding sounds. For phone calls, the Clear Voice Capture microphone will ensure your voice is clear. You can customize the sound using the Focal app on your iOS or Android device. When not in use, store the headphones in the provided rigid carrying case. To maintain them, clean the real leather and microfiber headband gently with a soft cloth. Don't expose the headphones to extreme temperatures or moisture. Also, make sure to turn them off when not in use to conserve battery life.