Mechanical gaming keyboard A4TECH Fstyler FBK25 – User Manual

User Manual – Wireless Keyboard A4TECH Fstyler FBK25, USB, Bluetooth / Radio Channel

Thank you for purchasing the A4TECH Fstyler FBK25 keyboard. This product comes with a variety of useful functions and features. We hope it will provide you with a new and enjoyable experience.

This universal keyboard allows you to input data and communicate on all your devices: Windows, Mac, Chrome OS, Android, iPad, iPhone, and more.

Technical Specifications

Keyboard type: Membrane
Low-profile keys: Yes
Key backlight: No
Total number of keys: 103
Numeric keypad: Yes
Keyboard layout: ANSI
Case material: Plastic
Keyboard format: 96%
Connection interface: Bluetooth, 2.4 GHz radio channel
Multi-device support: Yes
Number of simultaneous connections: 4
Power type: AA batteries
Width: 396 mm
Height: 25 mm
Depth: 145 mm
Keyboard weight: 469 g
Package contents: USB receiver, documentation, battery pack, set of interchangeable panels

(!) Battery life may vary depending on usage conditions and computer.

(!) Please note that all information is provided for reference only and under no circumstances constitutes a public offer. Specifications, software, design, and package contents may be changed for product improvement without prior notice.

Package Contents

Wireless keyboard Bluetooth/2.4 GHz
2.4 GHz nano receiver
Additional color panel
Type-C charging cable
USB extension cable
Alkaline battery
User manual

Device Layout

1. FN lock mode
2. Color panel
3. Function activation indicator
4. Device indicator
5. Hotkeys for access to 12 multimedia and internet functions
6. Device switching
7. Switching between operating systems
8. PC/MAC function keys

Side / Bottom

9. 2.4 GHz connection
10. Power On/Off
11. Receiver storage compartment
12. Battery compartment

2.4 GHz Device Connection

1. Plug the receiver into the USB port of the computer.

2. Switch on the keyboard power.

3. Indicator: The LED will glow yellow for 10 seconds. After connection, the LED will turn off.

(!) Note: For connection to the nano receiver, it is recommended to use the USB extension cable (ensure the keyboard is within 30 cm of the receiver).

Connecting BLUETOOTH Device 1
(for mobile phone / tablet / laptop)

1: Briefly press FN + 7 to select Bluetooth Device 1 – the indicator will light up blue.

Press and hold FN + 7 for 3 seconds – the LED will flash blue slowly during pairing.

2: Select [A4 FBK25] on your Bluetooth device.

The indicator will remain blue for a short time and then turn off after the keyboard is connected.

Connecting BLUETOOTH Device 2
(for mobile phone / tablet / laptop)

1: Briefly press FN + 8 to select Bluetooth Device 2 – the indicator will light up green.

Press and hold FN + 8 for 3 seconds – the LED will flash green slowly during pairing.

2: Select [A4 FBK25] on your Bluetooth device.

The indicator will remain green for a short time and then turn off after the keyboard is connected.

Connecting BLUETOOTH Device 3
(for mobile phone / tablet / laptop)

1: Briefly press FN + 9 to select Bluetooth Device 3 – the indicator will light up purple.

Press and hold FN + 9 for 3 seconds – the LED will flash purple slowly during pairing.

2: Select [A4 FBK25] on your Bluetooth device.

The indicator will remain purple for a short time and then turn off after the keyboard is connected.

Operating System Switching

Windows / Android is the default system layout.

(!) Note: The system layout you previously used will be saved. You can switch the layout again by performing the step described above.

Indicators
(for mobile phone / tablet / laptop)

Keyboard	2.4 GHz Device	Bluetooth Device 1	Bluetooth Device 2	Bluetooth Device 3
Indicator	🟡 Yellow	🔵 Blue	🟢 Green	🟣 Purple
Switching between devices	[Fn] + [0]	[Fn] + [7]	[Fn] + [8]	[Fn] + [9]
Switching: short press for 1 sec	Constant light for 10 sec	Constant light for 5 sec
Device pairing: long press for 3 sec	No pairing required	Pairing: slow flashing Connected: constant light for 10 sec

FN Combinations

FN Mode: you can lock and unlock FN mode by pressing FN + ESC alternately.

1. FN Lock Mode: no need to press the FN key.

2. Unlock FN Mode: FN + ESC

(!) After pairing, the FN key is locked in FN mode by default, and the FN lock state is preserved when turning on and off.

Windows / Android / Mac / iOS

F1: Home
F2: System switch
F3: Back
F4: Search
F5: Input switch
F6: Screenshot
F7: Previous track
F8: Play/Pause
F9: Next track
F10: Mute
F11: Volume down
F12: Volume up

Other FN Combinations

Key Combination	Windows	Android	Mac/iOS
[Fn] + [DELETE]	Pause	Pause	Pause
[Fn] +	Device brightness	Brightness +	Brightness +
[Fn] +	[Fn] + [9] -	Brightness -	Brightness -
[Fn] + [BACKSPACE]		Screen Lock	Screen Lock (iOS only)
[Fn] + [ENTER]	Scroll Lock	Scroll Lock

(!) Note: the last function corresponds to the current operating system in use.

Dual-Purpose Key

Multi-System Layout

Low Battery Indicator

When the battery charge is below 10%, the LED flashes red.

Built-in Mobile Device Stand

Additional colored panel included in the package.

Secure placement for a mobile device up to 6.8" with a comfortable reading angle.

Technical Specifications

Model: FBK25
Connection: Bluetooth / 2.4 GHz
Operating range: 5 ~ 10 m
Number of simultaneously connected devices: 4 devices (Bluetooth x3, 2.4 GHz x1)
Layout: Windows | Android | Mac | iOS
Battery life: approx. 650 h (up to 12 months)
Receiver: Nano USB receiver
Package contents: keyboard, nano receiver, USB extension cable, Type-C charging cable, user manual
System requirements: Windows / Mac / iOS / Chrome / Android / Harmony OS…

Frequently Asked Questions

How to switch the layout to another system?

You can switch the layout by pressing Fn + I/O/P for Windows | Android | Mac | iOS.

Can the layout be saved?

The layout you used previously will be saved.

How many devices can be connected?

You can switch and connect up to 4 devices simultaneously.

Does the keyboard remember the connected device?

The device you connected in the previous session will be remembered.

How can I check whether the current device is connected or not?

When powered on, the device indicator will stay lit. (disconnected: 5 sec, connected: 10 sec)

How to switch between connected Bluetooth devices 1-3?

Press the individual [FN] + Bluetooth keys (7–9).

Warning

The following actions may damage the product.

1. Do not disassemble, hit, smash, or throw the battery into fire.

2. Do not expose to direct sunlight or high temperatures.

3. Battery disposal must comply with local regulations; recycle where possible. Do not discard with household waste as this may cause an explosion.

4. Do not charge the battery at temperatures below 0°C.

5. Do not remove or replace the battery.

6. Use the supplied cable for charging the device.

7. Do not use any charging equipment with voltage higher than 5 V.

PURPOSE:

This device is intended for inputting information into a computer.

STORAGE CONDITIONS:

Store the device at temperatures from +5 to +40 °C with relative humidity not exceeding 85%, avoiding direct sunlight.

TRANSPORTATION CONDITIONS:

It is recommended to transport the product in its original packaging.

SALES CONDITIONS:

The device does not require special sales conditions.

DISPOSAL CONDITIONS:

For disposal of the device, please contact a specialized center.

INSTALLATION RULES AND CONDITIONS:

This device does not require any installation or permanent mounting.

Information on usage restrictions considering suitability for residential, commercial, and industrial zones:

The device is intended for use in residential, commercial, and industrial areas without exposure to hazardous or harmful factors.

The manufacturer reserves the right to change the package contents, technical specifications, and appearance of the product.
The manufacturer and distributors of this product are not responsible for damage to the device housing or for harm caused by improper or inappropriate use by the user.

Manufacturer:
A-FOUR TECH CO., LTD., Taiwan, 6F, No.108,
Min-Chuan Rd., Xindian District, New Taipei City, Taiwan (R.O.C.)
Importer: OOO «Merlion»
Address: 143401, Moscow Region, Krasnogorsk, Stroiteley Blvd., 4, Bldg. 1, Floor 8, Office 819
Authorized representative designated by the manufacturer to perform compliance confirmation actions and to assume responsibility for product non-compliance with Customs Union technical regulations:
OOO «Set Kompyuternykh Klinik»
Address: 127521, Moscow, Sheremetyevskaya St., 47, Floor 2, Room 31

Date of manufacture is indicated on the packaging.
Warranty period: 1 year. Service life: 1 year.
Shelf life: unlimited. Made in China.