FEKER IK75 RGB Three-Mode Gaming Keyboard
QUICK START
Keyboard Layout
The FEKER IK75 RGB is a compact 82-key gaming keyboard featuring a three-mode connectivity system (wired, 2.4GHz, Bluetooth). It includes a standard QWERTY layout with a function row (F1-F12), navigation cluster, arrow keys, a numeric keypad, and a multi-function rotary knob.
FN Combination Keys
Main Functions
| FN Combination Key | Win\Mac Function |
|---|---|
| FN+ESC | Restore factory settings |
| FN+F1 | My computer \ Screen brightness- |
| FN+F2 | Home \ Screen brightness+ |
| FN+F3 | Calculator \ Task control |
| FN+F4 | Multi-Media\F4 |
| FN+F5 | Last song\F5 |
| FN+F6 | Next song\F6 |
| FN+F7 | Pause / play \ Previous |
| FN+F8 | Stop \ Pause or play |
| FN+F9 | Mute \ Next |
| FN+F10 | Volume - \ Mute |
| FN+F11 | Volume + \- |
| FN+F12 | Mail \ Volume+ |
| FN+A | Switch to Win system mode |
| FN+S | Switch to MAC system mode |
| FN+I | PrtSc |
| FN+O | Scroll |
| FN+P | Pause |
| FN+Space | Turn backlight off / on |
| FN+Delete | Switch backlight mode |
| FN+Tilde | Switch backlight color |
| FN+Up Arrow | Backlight brightness+ |
| FN+Down Arrow | Backlight brightness- |
| FN+Right Arrow | Backlight speed+ |
| FN+Left Arrow | Backlight speed- |
| FN+CTRL_R | Switch decorative light mode |
| FN+ALT_R | Switch decorative light color |
Connectivity & Other Functions
| FN Combination Key | Win\Mac Function |
|---|---|
| FN+1 | Bluetooth NO.1: Short press to switch, long press 3S to enter pairing |
| FN+2 | Bluetooth NO.2: Short press to switch, long press 3S to enter pairing |
| FN+3 | Bluetooth NO.3: Short press to switch, long press 3S to enter pairing |
| FN+4 | 2.4G mode: Long press 3S to enter pairing |
| FN+Backspace | Inquiry of electric quantity |
| FN+Win | Lock windows key (only valid under Win system) |
Operating Instructions
1. Indicator light
The four independent indicators from top to bottom represent: A indicator (Caps Lock), B indicator (Win Lock), C indicator (2.4G mode), and D indicator (Bluetooth mode).
2. Knob function
Rotate counterclockwise for volume reduction. Press the knob to pause/play. Rotate clockwise for volume increase.
3. Inquiry of electric quantity
Long press FN + Backspace. The 1-0 keys indicate battery level: all keys on (over 50% green), 1-5 keys on (30-50% yellow), 1-3 keys on (under 30% red). Other keys remain off. The display reverts to the current lighting effect after releasing the key combination. Battery level can only be checked when the keyboard is powered by battery.
4. Power indicator
For the 3.7V lithium battery: The Ctrl_L key indicator light turns red and flashes when the battery is below 3.3V (low power). During charging, the Ctrl_L key indicator light is solid green. It returns to normal when fully charged. The keyboard automatically shuts down below 3.1V. In low power state, the indicator light remains on, signaling the need for charging.
5. 2.4G pairing
Turn the switch to the right (2.4G mode). Press and hold FN + 4 for 3 seconds to enter pairing mode. Insert the receiver; the white indicator flashes. Pairing is successful when the mode light stays on for 2 seconds. If no device is found within 30 seconds, pairing mode exits, and the keyboard enters sleep mode.
6. Bluetooth pairing
Toggle the switch to the middle position (Bluetooth mode). Press FN + 1, 2, or 3 to select a Bluetooth channel, then long press the same key for 3 seconds to enter pairing mode. The white indicator flashes quickly. If no device is found within 120 seconds, pairing mode exits, and the keyboard enters sleep. The device indicator stays on for 2 seconds after successful pairing.
7. Loopback indication
Upon waking from sleep or powering on, the keyboard attempts to reconnect to the last used device. If connection fails, it enters sleep. Pressing a key wakes it up and resumes connection attempts. For 2.4G, the white indicator flashes slowly during reconnection and stays solid for 2 seconds upon success. For Bluetooth, the white indicator also flashes slowly during reconnection and stays solid for 2 seconds upon success. Pressing a key during reconnection can extend the connection time. If connection fails within 10 seconds of releasing a key, the indicator turns off, and the keyboard sleeps. After 2 minutes of inactivity, the backlight turns off (power-saving mode). After 28 minutes of inactivity in power-saving mode, it enters deep sleep. Pressing a key wakes it from power-saving mode instantly. Waking from deep sleep requires the first key press to activate the keyboard.
8. Backlight Mode
FN + Delete: Cycles through 22 backlight modes. Constant light mode does not support speed adjustment. Neon mode does not support color adjustment. Music rhythm 1, music rhythm 2, and light shadow modes require driver software. Backlight brightness has five levels (default maximum). Backlight speed has five steps (default first step). Color switching order: colorful, red, orange, yellow, green, cyan, blue, purple, white.
FN + CTRL_R: Cycles through bottom decorative light effects: light wave (default), neon, horse running, breathing, always on, off. Lighting speed and brightness for these effects are not adjustable. Neon mode does not support color switching. Color order: colorful, red, orange, yellow, green, cyan, blue, purple, white.
9. Dual system
Restore default settings (backlight and key functions) for the current system mode. FN + A switches to Windows system mode. FN + S switches to MAC system mode. In MAC mode: Left Win key becomes Option, Left Alt key becomes CMD, Right Alt key becomes CMD. In Windows mode, F1-F12 keys function as standard F keys. In MAC mode, F1-F12 keys function as multimedia keys by default. If using a Windows PC in MAC mode, multimedia functions still apply. Other functions remain the same across modes.
Specifications and Compatibility
10. Equipment name
- Wired mode: Gaming keyboard
- 2.4G mode: 2.4G Wireless Device
- BT3.0 mode: FEKER IK75 3.0
- BT5.0 mode: FEKER IK75
11. Using distance
10m (360° unobstructed line of sight).
12. Bluetooth connection back time
Less than or equal to 5 seconds.
13. Compatibility
Bluetooth: Compatible with all Bluetooth dongles, built-in laptop Bluetooth modules. Bluetooth 5.0 requires Windows 8 or later, tablets, and mobile phones.
2.4G: Compatible with Windows 2000 or later and macOS, adhering to USB standard protocol.
14. Electrical specifications (for reference only)
| Parameter | Value |
|---|---|
| Charging current | 539-541mA |
| Wired normally on mode current | 149.2-155.3mA |
| 2.4G normally on mode current | 229mA |
| 2.4G sleep current | 0.05/0.22mA |
| Bluetooth 3.0 normally on mode current | 255mA |
| Bluetooth 3.0 sleep current | 0.04/0.21mA |
| Bluetooth 5.0 normally on mode current | 230-231mA |
| Bluetooth 5.0 sleep current | 0.04/0.21mA |
| Turn off backlight current | 12mA |
15. Multi key non punch
All modes and devices support full key non-punch functionality.
16. Connection
Wired, 2.4G, Bluetooth 3.0, Bluetooth 5.0.
17. RF rate
Keyboard RF power: -30dBm. Receiver RF power: -30dBm.
18. Operating frequency point
2402/2446/2479 MHz.
19. System requirements
Interface: USB
Operating system: Compatible with Windows 2000 or above and macOS. Bluetooth supports Windows 8 or above.
FCC Warning Statement
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
The device has been evaluated to meet general RF exposure requirement.
