A smartphone can be a laser pointer when you're showing a PowerPoint presentation in a meeting. Open your presentation in Presenter view
on your mobile device to use it as a remote control. Advance through the slides with a touch, and emphasize interesting things with the laser pointer.
Watch this video for a brief demonstration:

Note: This feature is only available if you have an Office 365 subscription. If you are an Office 365 subscriber, make sure you have the latest version of Office.
As demonstrated in the video, this feature requires that your smartphone have a gyroscope. But if you don't have an Office 365 subscription or don’t have a gyroscope, you can still use the laser pointer by pressing and holding on the slide area and moving your finger around the slide.
To connect your smartphone to a projector, use an HDMI adapter or connect wirelessly by using AirPlay, ChromeCast, or Miracast.