Sennheiser MOMENTUM True Wireless Instruction manual MOMENTUM True Wireless - Page 13

Using the earphones 3. Connect the USB-A connector to a corresponding socket of a USB power source (to be ordered separately). Make sure that the USB power source is connected to the power supply system. The rechargeable batteries of the earphones and the charging case are being charged. If no earphones are inserted into the charging case, only the rechargeable battery of the charging case is being charged. The LED of the charging case displays the charge status: LED Charging case WITH earbuds inserted Charging case WITHOUT earbuds inserted pulses  yellow ... earbuds and charging case are being charged ... charging case is being charged lights up green ... earbuds and charging case are fully charged ... charging case is fully charged flashes red ... a charging error/ battery error has been detected in at least one earbud (> 26) ... a charging error/ battery error has been detected in the charging case (> 26) Connecting the earphones to a Bluetooth device To be able to use the Bluetooth wireless connection, you must register both devices (earphones and e.g. smartphone) via the device settings of your smartphone. This process is called pairing. If operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth device you are using. If you switch the earphones on for the first time after initial charging, they automatically go into pairing mode. Information on the Bluetooth wireless connection The earphones are compatible with Bluetooth 5.0. If your audio source supports one of the following high-resolution audio encoding methods, music is automatically played in high audio quality: aptX, aptX® LL or AAC. Otherwise the headphones will play your music in normal audio quality (SBC). Paired devices establish the Bluetooth wireless connection immediately after switch-on and are ready for use. When you switch the earphones on, they automatically try to connect to the last connected Bluetooth device. The earphones can save the connection profiles of up to eight Bluetooth devices with which they have been paired. MOMENTUM True Wireless | 13