i void warranties: Logitech R500 Laser Presentation Remote
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Logitech R500 Laser Presentation Remote with Dual Connectivity Bluetooth or USB 97855171351 | eBay
LOGITECH R500 Laser Presentation Remote - YouTube
User manual Logitech R500 (English - 4 pages)
Amazon.com: Logitech R500s Laser Presentation Remote Clicker with Dual Connectivity Bluetooth or USB for Powerpoint, Keynote, Google Slides, Wireless Presenter - Black (Class 1 Laser) : Electronics