Acer Aspire E1-731G User Manual page 39

Click on the device you want to add.
A code displays on your computer, which should match the code
displayed on your device. Select Yes. Then, accept the pairing from
your device.
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.
Your device will show up in the list of devices if it was successfully
paired. Open the Control Panel and under Hardware and Sound
Using a Bluetooth connection - 39