TS820 Multi-Function Wireless Presenter w/ Laser Pointer & Trackball Mouse Ergonomic design in matt black soft feel casing Three Button design for email, Internet browser, desktop, My computer, Favorite program activation Built in 650nm Laser pointer with 150 Meter range (&lt;1mW - Class 2 Compliant) USB 2.0 (and 1.1) connection with plug and play installation Remote Page Controller allows access to PowerPoint, Word & PDF files from up to 15 meter. No line-of-sight limitation