Introduction
This manual provides detailed instructions for the ZJFKSDYX C87 Wireless Gaming Keyboard and Mouse Combo. It covers setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device. Please read this manual thoroughly before using the product.

Image: The ZJFKSDYX C87 Wireless Gaming Keyboard and Mouse Combo, featuring a black keyboard with rainbow backlighting, a black wireless mouse, and a USB receiver.
Package Contents
- 1 x ZJFKSDYX C87 Wireless Keyboard
- 1 x ZJFKSDYX Wireless Mouse
- 1 x USB Receiver (for 2.4G wireless connection)
- 1 x USB-C Charging Cable
- 1 x User Manual (this document)
Setup Instructions
- Initial Charging: Before first use, fully charge both the keyboard and mouse for approximately 8 hours using the provided USB-C charging cable. Connect the cable to a USB power source (e.g., computer USB port, USB wall adapter).
- Connect USB Receiver: Locate the USB receiver, typically stored in a compartment on the mouse or keyboard. Insert the USB receiver into an available USB port on your computer (PC, laptop, desktop).
- Power On: Turn on the keyboard and mouse using their respective power switches. The devices should automatically connect to your computer.
- Driver Installation: No additional drivers are required for most operating systems. The devices are plug-and-play.

Image: Diagram illustrating the 2.4GHz wireless connection, showing the keyboard, mouse, and USB receiver communicating wirelessly with a stable connection up to 10 meters.
Operating Instructions
Keyboard Operation
- Keys: The keyboard features 87 keys with anti-ghosting technology, providing a mechanical feel and ensuring accurate input during rapid key presses.
- Backlight Control:
- The keyboard has built-in three groups of rainbow backlight effects.
- Supports 2 breathing modes and 3 static modes.
- Adjustable with 4 brightness levels.
- Specific key combinations for backlight adjustment are typically marked on the keyboard (e.g., Fn + specific keys). Refer to the keyboard legends for exact controls.
- Volume Control: A dedicated volume control knob is located on the keyboard for convenient audio adjustment.

Image: The keyboard displaying adjustable rainbow backlighting, highlighting multi-mode switching and brightness/speed adjustments.

Image: Diagram showing the multi-function shortcut keys on the keyboard, activated by pressing the Fn key in combination with F1-F12 keys. Functions include Media, Volume -, Volume +, Quiet, Stop, Pre-tracking, Pause/Play, Next Track, Mail, Home, My Computer, and Calculator.

Image: Close-up of the keyboard's volume control knob, indicating its function for convenient audio adjustment and a power alert indicator.

Image: Side view of the keyboard highlighting its ergonomic design with six rows of keycaps and four steps in height, conforming to natural finger movement.

Image: Close-up of the keyboard's adjustable feet, providing solid support and a 125-degree tilt for increased stability.
Mouse Operation
- Ergonomic Design: The mouse is designed to fit comfortably in the palm, featuring an anti-sweat and non-slip surface for extended use.
- Lighting Effect: The mouse has a built-in 7-color cyclic gradual lighting effect.
- DPI Adjustment: The mouse typically includes a DPI button to adjust sensitivity. Refer to the mouse for specific button locations.

Image: The wireless mouse, highlighting its symmetrical design and multiple keys for conflict-free use.
Power Management and Charging
- Battery Capacity: The keyboard is equipped with a 3000 mAh battery, and the mouse has an 800 mAh battery.
- Battery Life: Enjoy up to 8 hours of usage with the backlight on. Actual battery life may vary based on usage and backlight settings.
- Smart Energy-Saving: Both devices feature smart energy-saving functions. After 2 minutes of inactivity, they automatically enter sleep mode. Pressing any key will awaken them.
- Recharging: Use the provided USB-C cable to recharge the devices. They can be used while charging.

Image: Illustration showing the rechargeable battery status for both the keyboard and mouse, emphasizing the intelligent power-saving function.

Image: Graphic depicting the intelligent sleep mode, indicating that the devices automatically enter a low-power state after 1 minute of inactivity.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the surfaces of the keyboard and mouse. For stubborn dirt, a slightly damp cloth can be used, ensuring no liquid enters the device.
- Keycaps: The ABS keycaps are manufactured using a two-color injection molding process, designed to prevent character fading over time.
- Storage: Store the devices in a cool, dry place away from direct sunlight and extreme temperatures.
- Durability: The keys are designed for a 10,000,000 keystroke lifetime.
Troubleshooting
- Connection Loss: If the wireless connection is lost, try the following:
- Ensure both the keyboard and mouse are powered on and fully charged.
- Remove and re-insert the USB receiver into a different USB port on your computer.
- Reset the code pairing: Specific instructions for resetting pairing may vary. Refer to the product packaging or contact customer support if needed.
- Unresponsive Keys/Mouse:
- Check battery levels and recharge if necessary.
- Ensure the USB receiver is securely connected.
- Restart your computer.
- Backlight Issues:
- Ensure the backlight is enabled and brightness is adjusted.
- Low battery can affect backlight performance. Charge the device.
If issues persist, please contact ZJFKSDYX customer support for assistance.
Specifications
| Model Number | C87 |
| Connectivity Technology | 2.4G Wireless |
| Keyboard Battery Capacity | 3000 mAh |
| Mouse Battery Capacity | 800 mAh |
| Keyboard Key Life | 10,000,000 keystrokes |
| Backlight | Rainbow (3 groups, 2 breathing modes, 3 static modes, 4 brightness levels) |
| Mouse Lighting | 7-color cyclic gradual effect |
| Compatible Devices | Gaming Console, Laptop, Personal Computer, Smartphone, Tablet, Television |
| Item Weight | 2.25 pounds |
| Package Dimensions | 17.52 x 6.38 x 2.05 inches |
Warranty and Support
ZJFKSDYX is committed to providing outstanding after-sales support. If you encounter any issues with your C87 Wireless Gaming Keyboard and Mouse Combo, or if you have questions not covered in this manual, please contact our customer service team. We will endeavor to resolve any problems promptly.
For support, please refer to the contact information provided on the product packaging or the official ZJFKSDYX website.





