Amazon.com : Original Replacement USB Receiver for Logitech Wireless Presenter R400 and R800 : Office Products
Amazon.com: Zotech Replacement USB Receiver (C-U0014) for LogitechWirelessPresenter R400/R700/R800 - Not Compatible with All R400/R700/R800 Models (See Details Before Buying) : Electronics
Logitech R400 Wireless Presenter - Black
Replacement USB Receiver for Logitech Wireless Presenter R400 & R800 | iSeaClear, Inc.
Amazon.com : Original Replacement USB Receiver for Logitech Wireless Presenter R400 and R800 : Office Products
List of Logitech products - Wikipedia
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Marcus Mengs on Twitter: "New receiver for @Logitech R400 presentation clicker mitigates wireless keystroke injection. Had 5 minutes to test a replacement receiver. The new ones marked with 'ESW3601' restrict injectable keys
Zotech Replacement USB Receiver (C-U0014) for LogitechWirelessPresenter R400/R700/R800 - Not Compatible with All R400/R700/R800 Models (See Details Before Buying) : Electronics - Amazon.com
Logitech R400 presenter pen USB 2.4G Wireless RF Remote control IR PPT Presenter Laser Pointer with Red Laser Retail packaging|pointer presenter|pen iphonepen laser pointer - AliExpress
Logitech Unifying Receiver for Connecting Multiple Devices
New USB Receiver for Logitech Wireless Presenter R400 R700 R800 (C-U0014) 702534996667 | eBay
Logitech USB Replacement R400 R800 3 | iSeaClear, Inc.