Logitech R400 Presenter Remote Control Black 910-001354 - Best Buy
Original Replacement USB Receiver for Logitech Wireless Presenter R400 and R800 Review - video Dailymotion
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