CITLLA Wireless Keyboard User Manual

Introduction

Thank you for choosing the CITLLA Wireless Keyboard. This full-size, multi-device, backlit keyboard with an integrated wrist rest is designed to enhance your typing experience across various devices. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance.

Figure 1: CITLLA Wireless Keyboard (Model K9100)

Product Features

• Full-Size Layout: Standard 1:1 layout for comfortable and familiar typing.
• Ergonomic Design: Features a built-in soft leather wrist rest and 3 adjustable tilt angles (0°, 4.5°, 8.3°) to reduce wrist fatigue.
• Multi-Device Connectivity: Supports dual Bluetooth channels (BT1, BT2) and a 2.4G wireless USB receiver, allowing seamless switching between up to three devices.
• Adjustable Backlight: 3 levels of adjustable brightness for typing in various lighting conditions. Controlled via FN + Up/Down arrow keys.
• Rechargeable Battery: Built-in rechargeable battery with USB-C charging. Provides up to 60 days of use with backlight off, and 2-3 days with backlight on. Supports charging while in use.
• Quiet Scissor-Switch Keys: Designed for smooth, low-noise typing, ideal for quiet environments.

Figure 2: Ergonomic Wrist Rest Design

Figure 3: 3-Level Foldable Stand for Adjustable Tilt

Figure 4: Scissor-Switch Key Structure

Package Contents

• CITLLA Wireless Keyboard (Model K9100)
• USB-C Charging Cable
• 2.4G Wireless USB Receiver (typically stored in the keyboard's battery compartment or a dedicated slot)
• User Manual (this document)

Setup Instructions

1. Charging the Keyboard

Before first use, it is recommended to fully charge the keyboard. Connect the supplied USB-C charging cable to the keyboard's charging port and the other end to a USB power source (e.g., computer USB port, USB wall adapter).

• The red power indicator light will illuminate while charging.
• The indicator light will turn off automatically when the keyboard is fully charged.
• A full charge typically takes 4-5 hours.

Figure 5: Charging the Keyboard

2. Connecting to Devices

The keyboard supports three connection modes: 2.4G Wireless (via USB receiver) and two Bluetooth channels (BT1, BT2).

Figure 6: Multi-Device Connectivity Overview

2.1. 2.4G Wireless Connection

1. Locate the 2.4G USB receiver. It is usually stored in a slot on the keyboard.
2. Plug the 2.4G USB receiver into an available USB-A port on your computer or laptop.
3. Slide the power switch on the keyboard to the "ON" position.
4. Press the FN + 1 keys simultaneously to switch to 2.4G wireless mode. The indicator light for channel 1 will blink and then become solid when connected.
5. The keyboard should now be connected and ready for use.

2.2. Bluetooth Connection (BT1 / BT2)

1. Slide the power switch on the keyboard to the "ON" position.
2. Press and hold FN + 2 (for BT1) or FN + 3 (for BT2) for 3-5 seconds until the corresponding indicator light blinks rapidly. This indicates the keyboard is in pairing mode.
3. On your device (computer, tablet, smartphone), enable Bluetooth and search for new devices.
4. Select "CITLLA K9100" or a similar name from the list of available devices.
5. Follow any on-screen prompts to complete the pairing process. The indicator light on the keyboard will become solid when successfully paired.
6. Repeat steps 2-5 to connect a second Bluetooth device using the other Bluetooth channel (BT1 or BT2).

Operating Instructions

1. Switching Between Devices

To switch between connected devices, simply press the corresponding function key:

• Press FN + 1 to switch to the 2.4G wireless connected device.
• Press FN + 2 to switch to the Bluetooth 1 connected device.
• Press FN + 3 to switch to the Bluetooth 2 connected device.

Figure 7: Keyboard Layout and Function Keys

2. Backlight Control

The keyboard features a 3-level adjustable backlight.

• Press FN + Up Arrow to increase backlight brightness.
• Press FN + Down Arrow to decrease backlight brightness or turn it off.

3. Multimedia and Function Keys

The top row of keys combines standard function keys (F1-F12) with multimedia controls. To use the multimedia functions, press the FN key simultaneously with the desired function key.

Maintenance

1. Cleaning

To clean the keyboard, use a soft, lint-free cloth. For stubborn dirt, slightly dampen the cloth with water or a mild cleaning solution. Avoid using harsh chemicals, abrasive cleaners, or spraying liquids directly onto the keyboard.

2. Battery Care

• Charge the keyboard regularly to maintain battery health.
• Avoid completely draining the battery frequently.
• If storing the keyboard for an extended period, charge it to about 50% before storage and recharge every few months.

Troubleshooting

Specifications

Figure 8: Product Dimensions and Weight

Warranty and Support

CITLLA products are designed and manufactured to the highest quality standards. For warranty information and technical support, please refer to the contact details provided on the product packaging or visit the official CITLLA website.

Manufacturer: CITLLA

For further assistance, please contact CITLLA customer service.