Acer TravelMate P245-MG - Manual (Page 42)

42 - Using a Bluetooth connection
4. Select the Allow Bluetooth devices to find this computer check
box, click Apply, and then click OK.
Adding a Bluetooth device
Every new device must first be "paired" with your computer’s
Bluetooth adapter. This means it must first be authenticated for
security purposes. You only need to pair once. After that, simply
turning on the Bluetooth adapter of both devices will connect them.
From the notification area, click the Bluetooth icon, and select Add a
Bluetooth Device.