Elecom M-XGS30BBSK Series User Manual page 42

4) Check that "Bluetooth" is enabled.
If unavailable, tap to enable.
5) Slide the switch to switch between the connected devices.
Please refer to
The selected connected Bluetooth device will be registered under your connected
devices.
6) Hold down the pairing button at the bottom of the product for 3 seconds and
then release.
Pairing mode will be activated and the LED will blink.
The LED will blink white when the connected device is "PC1" and green when it is "PC2".
"Switch connected device" to switch between connected devices.