Acer Aspire E5-471 User Manual page 38

38 - Using a Bluetooth connection
4. Tap the device you wish to add from the list of discovered devices,
and tap Pair.
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.