wireless - Solaar (software for BT pairing of Logitech devices) is popping up with error message - Ask Ubuntu
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Logitech K400 Professional Wireless Touch Keyboard - Wireless Connectivity - RF - USB InterfaceTouchPad - Compatible with PC, Windows, iOS, Android, Linux - Mute, Volume Up, Volume Down Hot Key(s) - B - Newegg.com
Logitech K400+ Keyboard Water Spill Repair – CubicleNate's Techpad
105974 – Logitech K400: double tap on touchpad is filtered by debouncing code
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Logitech K400 Plus Touchpad Keyboard for TV connected PC
Solaar' Lets You Manage Logitech's Unifying Receiver on Linux - OMG! Ubuntu!
Logitech K400+ Keyboard Water Spill Repair – CubicleNate's Techpad
keyboard - How To Replace Logitech Wireless Unified USB Plug In Ubuntu - Ask Ubuntu
Quick Logitech K400 Plus Review: a compact HTPC keyboard | SHB