Amazon.com : GenuineLogitech Replacement USB Receiver for WirelessPresenter R400&R800 : Office Products
Amazon.com : Original Replacement USB Receiver for Logitech Wireless Presenter R400 and R800 : Office Products
Logitech R400 Wireless Presenter Review - YouTube
Exquisite Hard Eva Outdoor Travel Case Storage Bag Carrying Box For-logitech Presenter R800 R400 Case N15 21 Dropship - Speaker Accessories - AliExpress
User manual Logitech R400 (English - 32 pages)
Logitech R400 Wireless Presenter Remote Control
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RR0008 Wireless Presenter User Manual Logitech Far East