Keyboard Science] TIL that the Logitech K800, the K810 AND the M515 "Couch Mouse" all use a variation of this proximity detection technology to save battery life : r/MechanicalKeyboards
Logitech K800 Illuminated Wireless Keyboard - German Layout
Keyboard opening Logitech Illuminated K800 / Sudo Null IT News
Go Wired or Wireless - Logitech K800 Keyboard Review
Logitech K800 Illuminated Wireless Keyboard for Windows, 2.4 GHz Wireless with USB Unifying Receiver, Laser-Etched Backlit Keys, Perfectstroke Keys, Rechargeable, PC/Laptop QWERTY UK Layout, Black by Logitech (B0042T7VGQ) | Amazon price tracker /