OS X Yosemite: Bluetooth overview
Bluetooth lets you make short-range wireless connections between devices, eliminating the need for cables. Devices enabled with Bluetooth, such as computers, mobile phones, handheld devices, and so on, can connect to each other wirelessly at distances of up to 30 feet.
Use the Bluetooth pane of System Preferences to connect to other Bluetooth devices. Choose Apple menu > System Preferences, then click Bluetooth.
With Bluetooth you can: