SetPoint – Other software you may need to use with K750 Then, you add K750 to the new receiver with Logitech Unifying software. You can buy a replacement of Unifying receiver alone at Amazon. Lost a Unifying receiver, what should I do? You can add up to six devices on one Unifying receiver. You can add or remove other Logitech devices to the same Unifying receiver with Logitech Unifying software. How to add and pair other Logitech devices with the same Unifying receiver Go to to download software for Windows.And the Lux Meter shows you how much power your light source is providing at any time. The software tells you the current remaining power. You can download the software called Logitech Solar App from the website. Logitech Solar App software for more detailed charging status If you get the red light, you should brighten the surroundings by turning on a desk lamp, moving to the well-lit room, etc. The green light with a smiley face means the keyboard has a good light source, and the red light with a frown face means the keyboard has an insufficient light source. When you press the button, indicator light next to it illuminates either a green or a red LED light.

You can check the charging status by pressing the button just above the Num-Lock key.

Logitch solar powered keyboard