Revised Content:

Customizing Keyboard Lighting and FN Key Functions

1. LED Control: Turn the backlight on/off or switch the backlight color.
2. FN + LED: Toggle between 1-color and 3-color breathing mode.
3. FN + PU/PD: Increase or decrease the backlight brightness.
4. FN + +/-: Adjust the breathing rate (speed up or slow down).
5. FN + W: Exchange the WASD and arrow keys.
6. FN + WIN: Lock the Windows key.
7. FN + (F1-F12): Access 12 multimedia combination keys.

Key Notes:

1. The keyboard and mouse share a single USB receiver located at the bottom of the mouse. (The lights will only illuminate when the receiver is plugged in.)
2. Fully charge the devices before the first use.
3. No software installation required - just turn on the switch and plug in to use.
4. Keyboard/mouse may experience a slight delay or lack of lighting if the battery is low; please charge in time. The charging indicator will turn off when fully charged.
5. Use a charger with a voltage lower than DC:5V to protect the battery life.
6. Turning off the backlight can moderately extend the battery life.
7. If the "WASD" or arrow keys are not functioning, press FN + W to toggle between the letter and arrow keys. If the numeric keys are not working, press NumLock.
8. Pairing the USB receiver: Keyboard: Turn on, press and hold ESC + K, then insert the receiver. Mouse: Turn the switch to the sun logo, press and hold the wheel + right button, then insert the receiver.
9. For any issues, we'll do our best to provide a solution.

Product Options: K10 Wireless Keyboard & Mouse Combo, K10 Wired Keyboard & Mouse Combo, K20 Wireless Keyboard & Mouse Combo, K84 Wireless Keyboard & Mouse Combo, K62 Wireless Keyboard & Mouse Combo, K10 Wireless RGB Keyboard & Mouse Combo

product information: