Using the Behringer T-BUDS is easy. First, take the earphones out of the charging case. They'll automatically turn on and pair with your device via Bluetooth. Select the Behringer T-BUDS from your device's Bluetooth settings. Put the earphones in your ears and choose the right size of silicone buds for a comfortable and secure fit. To control the earphones, simply touch the surface of the earbuds. You can play or pause music, skip tracks, adjust the volume, and use voice commands. When it comes to the noise cancellation feature, you can switch between ANC and transparent mode to suit your needs. For battery life, the earphones can last up to 4 hours on a single charge. If you run out of power, just put them back in the charging case to recharge. The charging case can extend the battery life up to 16 hours. Use the included USB cable to charge the case. As for maintenance, keep the earphones dry because of the splash-proof (IPX4) design. Avoid exposing them to excessive water or high humidity. Clean the earphones and the charging case regularly with a soft, dry cloth. And don't forget to replace the silicone buds if they get dirty or worn out.