Fn is the bottom key of the 4 function switches on the top right.

Under ESC, 1, 2, 3, 4 there are LEDs on PCB.

Esc, 1/2/3 or 4 will flash 3 times to show the current mode when you press Fn+tab

1. The LED under Esc represents the battery level and wired mode
   1. In wired mode
      1. The Esc light will keep flashing if the keyboard is not plugged in with a USB cable and the battery toggle is turned on.
      2. Once the USB cable is plugged in, the battery will be charged, and the Esc light will flash several times and turn off.
      3. When the battery is full, the Esc light will light up for about 3 seconds then turn off.
   2. In wireless mode
      1. The led lights in the mid will start to flicker when the battery level is low with the highest brightness. We recommend charging the keyboard as soon as you notice these signs.
      2. After plugging in the USB cable, the Esc light will turn white and stay on for about 3 seconds, then turn off.
      3. When the battery is full, the Esc light will light up for about 3 seconds then turn off.
2. 1/2/3 LED lights represent BT mode and paired BT device
   1. Press Fn+tab until the 1/2/3 lights flash together 3 times to enter the Bluetooth mode
      1. no action is allowed until they flash 3 times
   2. Pairing
      1. press and hold Fn+any of Q/W/E (not 1/2/3) until the light under 1/2/3 flashes rapidly to start pairing.
         • each key (Q, W, E) can be paired to a different device
      2. on your device (Windows - Settings - BT and other devices - pairing), select NEO80 and follow the instructions on the screen to pair
         • if no more action is taken, all lights will go off; waking up the keyboard by pressing any key will force it to search again
      3. LED will turn off once pairing has been completed
   3. Press Fn+Q/W/E will choose the device (1/2/3) you want to use the keyboard on
      1. if no device is paired, all LEDs will stay off
      2. if connected, the LED will flash 3 times to indicate which device it has paired to, and the keyboard will automatically reconnect
      3. if not connected, the LED will continue to flash slowly, indicating that it is still searching for devices
         • users may need to manually choose the keyboard on the paired device via the BT settings to connect
         • users may press Fn+Q/W/E to switch between devices to connect to
3. 4 represents 2.4Ghz mode and the paired device
   1. pairing
      1. if it’s never paired before, please do not plug in the 2.4Ghz dongle
      2. press Fn+tab until the 4 key flashes 3 times to enter the 2.4Ghz mode
      3. press and hold Fn+R until the light flashes briefly
      4. insert the 2.4Ghz dongle
      5. press any key to see if they are working
   2. if paired before, the dongle can stay connected to your device, the keyboard and the device will connect automatically once the keyboard is switched to 2.4Ghz mode