Install Bluetooth
To get Bluetooh working on Arch Linux install [c]bluez[/c] and [c]bluez-utils[/c]. Both are available from the official repositories.
sudo pacman -S bluez bluez-utils
Install GUI
Install Blueman if you want GUI to manage bluetooth.
sudo pacman -S blueman
Start the bluetooth service
sudo systemctl start bluetooth
To start bluetooth on startup
sudo systemctl enable bluetooth