Wireless presenter PP-927.
Wireless Control:
Equipped with grade micro chip, operating on 2.4G RF frequency, up to 100 meters wireless range. 
Simple design, compact and portable.
Buttons:
Page up / page down / volume / play slides / full screen / black screen / hyperlink for PowerPoint presentation.
Support Windows XP / 7 / 8, Mac OS, Linux, Android. No hassle setup, plug and play.