Bluetooth is now a days very common in mobile phones. All laptops now a days are equipped with the bluetooth.
We normally used bluetooth as a medium to transfer the files between two devices. Mobile phone can also be use as remote control of the pc/laptop when connected with the bluetooth device.
Remote Control feature is inbuilt in many mobile phones through which one can play music , videos, slideshow presentation.
Connect your mobile with pc/laptop using bluetooth and check for the remote control in your mobile (normaly under entertaintment section). Open powerpoint presentation on pc and run (f5) n now you can control it using mobile phone. Amazing !!!