USB-C<\/strong><\/td>\n| Wired operation, charging, and diagnostics.<\/td>\n | Yes<\/strong><\/td>\n<\/tr>\n\n2.4 GHz<\/strong><\/td>\n| Wireless connection through the included USB receiver.<\/td>\n | Yes<\/strong><\/td>\n<\/tr>\n\nBluetooth<\/strong><\/td>\n| Connection without a USB receiver.<\/td>\n | Not recommended for Software configuration<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nConnecting via USB-C<\/h3>\n\n- Switch the keyboard to wired mode.<\/li>\n
- Connect the USB-C cable.<\/li>\n
- Connect the other end directly to the computer.<\/li>\n
- Wait for Windows to detect the device.<\/li>\n
- Check normal text input.<\/li>\n<\/ol>\n
Wired mode is recommended for the initial Software installation and for troubleshooting.<\/p>\n Connecting via 2.4 GHz<\/h3>\n\n- Switch the keyboard to 2.4 GHz mode.<\/li>\n
- Connect the included USB receiver to the computer.<\/li>\n
- Wait a few seconds.<\/li>\n
- Check text input.<\/li>\n<\/ol>\n
If the keyboard and receiver are already paired, the connection is usually established automatically.<\/p>\n If 2.4 GHz does not work<\/h3>\n\n- Fully charge the keyboard.<\/li>\n
- Disconnect and reconnect the included receiver.<\/li>\n
- Use a USB port directly on the computer.<\/li>\n
- Do not use a USB hub during diagnostics.<\/li>\n
- Try another USB port.<\/li>\n
- Turn 2.4 GHz mode off and on again.<\/li>\n
- Check the keyboard via USB-C.<\/li>\n
- Check Bluetooth.<\/li>\n<\/ol>\n
Do not use the re-pairing combination from another Redragon model just because it looks similar.<\/strong> For K552-KRS, the exact 2.4 GHz re-pairing key combination is not confirmed reliably enough in the available documentation.<\/div>\nBluetooth and multiple devices<\/h3>\nK552-KRS supports Bluetooth and can use multiple saved wireless connections. Before the first connection, switch the keyboard to Bluetooth mode and activate the required Bluetooth channel according to the markings on the keys of your specific keyboard.<\/p>\n Then in Windows:<\/p>\n \n- Open Settings \u2192 Bluetooth & devices<\/strong>.<\/li>\n
- Turn on Bluetooth.<\/li>\n
- Click Add device<\/strong>.<\/li>\n
- Select Bluetooth<\/strong>.<\/li>\n
- Select the keyboard from the list of detected devices.<\/li>\n
- Complete pairing.<\/li>\n<\/ol>\n
Bluetooth does not connect<\/h3>\n\n- Check the keyboard battery level.<\/li>\n
- Make sure Bluetooth mode is selected.<\/li>\n
- Try another saved Bluetooth channel.<\/li>\n
- Remove the previous keyboard entry from Windows.<\/li>\n
- Put the selected channel into pairing mode again.<\/li>\n
- Add the keyboard again.<\/li>\n<\/ol>\n
Bluetooth connects to an old device<\/h3>\nIf the selected Bluetooth channel was previously used with another computer, phone, or tablet, the keyboard may try to restore the previous connection.<\/p>\n \n- Turn off Bluetooth on the old device.<\/li>\n
- Select another Bluetooth channel or clear the old pairing.<\/li>\n
- Remove the previous K552-KRS entry from Windows.<\/li>\n
- Perform pairing again.<\/li>\n<\/ol>\n
Bluetooth works, but Software displays Device not detected<\/h3>\nIf the keyboard types normally via Bluetooth but Redragon Software does not detect it, change the connection mode first.<\/p>\n \n- Close Redragon Software.<\/li>\n
- Switch to USB-C or 2.4 GHz.<\/li>\n
- Wait for Windows to detect the device.<\/li>\n
- Check normal input.<\/li>\n
- Start Redragon Software again.<\/li>\n<\/ol>\n
Do not remove a working Bluetooth driver just because of the Device not detected message.<\/strong> If the keyboard types normally, first check the connection mode used by the software.<\/div>\nInstalling the software in Windows 11<\/h3>\n\n- Connect K552-KRS via USB-C or 2.4 GHz.<\/li>\n
- Check normal keyboard operation.<\/li>\n
- Download the official Software.<\/li>\n
- Close Redragon programs for other devices.<\/li>\n
- Run the installer EXE.<\/li>\n
- Complete the installation.<\/li>\n
- Keep the keyboard connected.<\/li>\n
- Start Redragon Software.<\/li>\n<\/ol>\n
Installing the software in Windows 10<\/h3>\n\n- Connect the keyboard via USB-C or 2.4 GHz.<\/li>\n
- Wait for Windows to automatically install the HID device.<\/li>\n
- Check text input.<\/li>\n
- Run the official installer.<\/li>\n
- Complete the installation.<\/li>\n
- Start Software while the keyboard is connected.<\/li>\n<\/ol>\n
The software does not detect K552-KRS<\/h3>\n\n- If Bluetooth is being used, switch to USB-C or 2.4 GHz.<\/li>\n
- Close the software.<\/li>\n
- Connect the keyboard directly to the computer.<\/li>\n
- Try another USB port.<\/li>\n
- Do not use a USB hub.<\/li>\n
- Make sure that Software specifically for K552-KRS is installed.<\/li>\n
- Close Redragon programs for other keyboards and mice.<\/li>\n
- Start Software again.<\/li>\n<\/ol>\n
Reinstalling the software in Windows 11<\/h3>\n\n- Open Settings \u2192 Apps \u2192 Installed apps<\/strong>.<\/li>\n
- Find the Redragon program.<\/li>\n
- Click the three-dot button.<\/li>\n
- Select Uninstall<\/strong>.<\/li>\n
- Restart the computer.<\/li>\n
- Connect K552-KRS via USB-C.<\/li>\n
- Install the official Beta 1.0.4.6 package again.<\/li>\n<\/ol>\n
Reinstalling the software in Windows 10<\/h3>\n\n- Open Settings \u2192 Apps \u2192 Apps & features<\/strong>.<\/li>\n
- Find Redragon Software.<\/li>\n
- Click Uninstall<\/strong>.<\/li>\n
- Restart the computer.<\/li>\n
- Connect the keyboard via USB-C.<\/li>\n
- Install the official package again.<\/li>\n<\/ol>\n
Part 2. Configuring and troubleshooting Redragon K552-KRS<\/h2>\nK552-KRS backlighting<\/h3>\nK552-KRS has multicolor Rainbow backlighting with several built-in effects. The official specification lists 19 modes and adjustable speed and brightness.<\/p>\n It is important to distinguish Rainbow backlighting from full per-key RGB configuration. For this model, you should not expect an arbitrary individual color for each key unless such a mode is confirmed by the software or documentation for your specific keyboard.<\/p>\n Configuring the backlight through Software<\/h3>\n\n- Connect the keyboard via USB-C or 2.4 GHz.<\/li>\n
- Start Redragon Software.<\/li>\n
- Open the lighting section.<\/li>\n
- Select an available effect.<\/li>\n
- If the corresponding settings are available, change the brightness and speed.<\/li>\n
- Apply the changes.<\/li>\n<\/ol>\n
The backlight does not change<\/h3>\n\n- Make sure the software detects K552-KRS.<\/li>\n
- Do not use Bluetooth when troubleshooting Software.<\/li>\n
- Switch to USB-C.<\/li>\n
- Change only one setting.<\/li>\n
- Apply the change.<\/li>\n
- Close and restart the software.<\/li>\n<\/ol>\n
Hardware lighting key combinations<\/h3>\nK552-KRS allows several functions to be controlled directly from the keyboard. However, markings and key combinations may differ between different K552 models.<\/p>\n For hardware switching of lighting modes, speed, and brightness, refer to the secondary markings printed on the keys of your specific K552-KRS.<\/p>\n Do not copy Fn combinations from instructions for K552-KR, K552P-KB, K552P-KR, or other K552 models.<\/strong> The same case and series name do not guarantee the same hardware function layout.<\/div>\nConfiguring macros and keys<\/h3>\nIf the corresponding function is available in the installed version of Software:<\/p>\n \n- Connect K552-KRS via USB-C or 2.4 GHz.<\/li>\n
- Start the software.<\/li>\n
- Open the key assignment or macro section.<\/li>\n
- Create a short test macro.<\/li>\n
- Record several keystrokes.<\/li>\n
- If necessary, configure the available delays.<\/li>\n
- Assign the action to a supported key.<\/li>\n
- Apply the changes.<\/li>\n
- Check the result in a safe application.<\/li>\n<\/ol>\n
A key performs the wrong action after configuration<\/h3>\n\n- Connect the keyboard via USB-C.<\/li>\n
- Start Redragon Software.<\/li>\n
- Check recently changed assignments.<\/li>\n
- Delete the problematic macro.<\/li>\n
- Restore the key’s default action.<\/li>\n
- Apply the changes.<\/li>\n
- Close the software and check the keyboard again.<\/li>\n<\/ol>\n
The keyboard flashes and does not connect<\/h3>\nIf K552-KRS starts flashing continuously and at the same time stops working properly over a wireless connection:<\/p>\n \n- Fully charge the keyboard.<\/li>\n
- Turn it off and on again.<\/li>\n
- Connect it via USB-C.<\/li>\n
- Check operation without Redragon Software.<\/li>\n
- Disconnect the included 2.4 GHz receiver and reconnect it.<\/li>\n
- Remove the old Bluetooth pairing and create a new one.<\/li>\n
- Test the keyboard on another computer.<\/li>\n<\/ol>\n
Individual user reports describe cases where K552-KRS starts flashing white and stops connecting, but there is not enough data to consider this a common model-wide defect.<\/p>\n The keyboard turns off the backlight by itself<\/h3>\nIn wireless mode, automatically reducing backlight activity or entering sleep mode may be used to save battery power.<\/p>\n If the device wakes immediately after a key is pressed and continues working, first rule out normal power-saving behavior rather than a HID driver malfunction.<\/p>\n The keyboard discharges quickly<\/h3>\n\n- Fully charge the keyboard.<\/li>\n
- Reduce the backlight brightness.<\/li>\n
- Turn off the backlight for testing.<\/li>\n
- Use only one wireless mode.<\/li>\n
- Compare battery life with and without backlighting.<\/li>\n
- Try another known-good USB-C cable.<\/li>\n<\/ol>\n
One key misses or duplicates keystrokes<\/h3>\nK552-KRS supports hot-swap for compatible 3-pin mechanical switches. Therefore, after ruling out a software-related cause, you can check the switch.<\/p>\n First:<\/p>\n \n- Close Redragon Software.<\/li>\n
- Test the key in a regular text editor.<\/li>\n
- Test the keyboard on another computer.<\/li>\n
- If key assignments or macros were changed, restore the default settings.<\/li>\n
- Only then check the mechanical switch.<\/li>\n<\/ol>\n
How to check a switch using hot-swap<\/h3>\n\n- Turn off the keyboard.<\/li>\n
- Disconnect the USB-C cable.<\/li>\n
- Remove the keycap from the problematic key.<\/li>\n
- Carefully remove the switch using a suitable tool.<\/li>\n
- Inspect the three switch contacts.<\/li>\n
- If a contact is bent, do not force the switch into place.<\/li>\n
- Swap the switch with a known-good compatible 3-pin switch.<\/li>\n
- Turn on the keyboard and test both positions.<\/li>\n<\/ol>\n
If the problem moves with the switch, the switch is likely faulty.<\/p>\n If the problem remains in the same position, there may be a problem with the hot-swap socket or circuit board.<\/p>\n K552-KRS is officially specified for 3-pin hot-swap switches.<\/strong> Do not force an incompatible switch into place and do not attempt to mechanically modify the socket.<\/div>\n | | | | |