Built-in red laser pointer - Trackball function with left/right mouse button - Instant controlling of Microsoft PowerPoint & Media Player - To make your presentation flow continuously the Wireless Presenter integrates the slide up/down functions with a laser pointer on a remote hand held device using a wireless technology - The Wireless Presenter's attractive and compact design enables mobility of up to 15 meters from the laptop/PC while still maintaining a full navigational control of your presentations - The Wireless Presenter does not require any software and PC programming and take just a few seconds to install and use - USB 1.1 interface HID Class. Plug and play function. No PC programming or S/W driver - Working on any computer with USB port. Support Windows Vista XP & 2000 Mac OS Linux - Frequency: 433MHz - Powered by 2*AAA batteries(included) - Package includes: 1*wireless remote 1*USB receiver dongle 2*AAA batteries 1*pouch 1*user Manual (Chinese)