acer AS_Desktop_tower_models_UM_(date)_EN.book (no specific model number given) — Acer Desktop Tower User & Service Manual PDF (April 2020 Edition) (EN)

14 - Using a Bluetooth connection 4.Select the device you wish to pair from the list of discovered devices. 5.After pairing, if there is a code displaying on the screen, enter that code on the device to proceed the connection. Note Some devices using older versions of the Bluetooth technology require both devices to enter a PIN. In the case of one of the devices not having any inputs (as in a headset), the passcode is hardcoded into the device (usually "0000" or "1234"). Consult your device’s user manual for more information. You can also enter the Bluetooth settings by selecting the Notifications icon in the lower right-hand corner of the screen to open the Notifications pane.

From here, you can enable or disable Bluetooth or right-click on Bluetooth > Go to Settings to enter the Bluetooth settings.