1. Introduction
Thank you for choosing the Everest KB-BT90 Wireless Keyboard. This versatile keyboard offers both Bluetooth and 2.4GHz wireless connectivity, a built-in stand for mobile devices, and broad compatibility with Mac, Windows, Android, and iOS operating systems. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device.
2. Product Overview
The Everest KB-BT90 is designed for convenience and efficiency. It features a full-size Q-layout keyboard with multimedia function keys, a dedicated slot to hold smartphones or tablets, and a rechargeable battery. The keyboard supports simultaneous connection to multiple devices via Bluetooth and a single device via 2.4GHz wireless technology, allowing for seamless switching between them.

Figure 2.1: Top view of the Everest KB-BT90 Wireless Keyboard, showing the key layout and integrated stand.

Figure 2.2: Side view of the Everest KB-BT90 Wireless Keyboard, highlighting the integrated stand for mobile devices.
3. Setup
3.1. Charging the Keyboard
- Locate the charging port on the keyboard.
- Connect the provided USB charging cable to the keyboard and a USB power source (e.g., computer USB port, USB wall adapter).
- The charging indicator light will illuminate during charging and turn off or change color when fully charged.
3.2. 2.4GHz Wireless Connection
- Locate the 2.4GHz USB receiver, usually stored in a compartment on the keyboard or in the packaging.
- Plug the USB receiver into an available USB port on your computer or device.
- Turn on the keyboard using the power switch.
- The keyboard should automatically connect to your device. If not, press the 2.4Ghz connection key (often indicated by a 2.4Ghz icon or '1' with a dongle icon) to activate the 2.4GHz mode.
3.3. Bluetooth Connection
The keyboard supports up to three Bluetooth devices. Use the dedicated Bluetooth keys (BT1, BT2, BT3) to switch between them.
- Turn on the keyboard using the power switch.
- Press and hold one of the Bluetooth keys (e.g., Fn + BT1) for 3-5 seconds until the corresponding indicator light starts blinking rapidly. This indicates the keyboard is in pairing mode.
- On your device (computer, tablet, smartphone), go to Bluetooth settings and enable Bluetooth.
- Search for available devices. You should see "Everest KB-BT90" or a similar name appear in the list.
- Select the keyboard to pair. Your device may prompt you to enter a code on the keyboard and press Enter.
- Once paired, the indicator light will stop blinking and remain solid for a few seconds before turning off.
- Repeat these steps for other Bluetooth devices using Fn + BT2 and Fn + BT3.
3.4. Switching Operating Systems
The keyboard has dedicated keys to optimize its layout for different operating systems:
- Fn + Q: For Android devices
- Fn + W: For Windows devices
- Fn + E: For Mac / iOS devices
Press the appropriate key combination to ensure correct key mapping and functionality for your connected device.
4. Operating Instructions
4.1. Basic Keyboard Functions
- Typing: Use the standard Q-layout keys for text input.
- Function Keys (F1-F12): These keys often have secondary multimedia or system functions. To activate the secondary function, press the Fn key simultaneously with the desired F-key. For example, Fn + F1 might open a browser, Fn + F7 might play/pause media. Refer to the keycap legends for specific functions.
- Integrated Stand: Place your smartphone or tablet into the integrated groove at the top of the keyboard for convenient viewing while typing.
4.2. Switching Between Connected Devices
- To switch to a 2.4GHz connected device, press the 2.4Ghz connection key.
- To switch to a Bluetooth connected device, press the corresponding Bluetooth key (Fn + BT1, Fn + BT2, or Fn + BT3) briefly. The keyboard will connect to the last paired device on that channel.
5. Maintenance
5.1. Cleaning
- Turn off the keyboard before cleaning.
- Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe the surface.
- For dust and debris between keys, use compressed air.
- Avoid using harsh chemicals, abrasive cleaners, or excessive moisture.
5.2. Storage
When not in use for extended periods, turn off the keyboard to conserve battery life. Store it in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
6.1. Keyboard Not Responding
- Check Power: Ensure the keyboard is turned on and has sufficient battery charge. Recharge if necessary.
- Check Connection Mode: Verify that the keyboard is set to the correct connection mode (2.4GHz or the appropriate Bluetooth channel) for your device.
- 2.4GHz Connection: Ensure the USB receiver is securely plugged into your device. Try a different USB port.
- Bluetooth Connection: Ensure Bluetooth is enabled on your device. Try re-pairing the keyboard.
- Interference: Move the keyboard closer to your device and away from other wireless devices that might cause interference.
6.2. Keys Not Working Correctly
- Operating System Mode: Ensure the keyboard is set to the correct operating system mode (Fn + Q/W/E) for your device.
- Clean Keys: Check for any debris or obstructions under the keys. Clean as described in the Maintenance section.
- Restart: Turn off the keyboard, then turn it back on. Restart your connected device if the issue persists.
6.3. Charging Issues
- Cable and Port: Ensure the charging cable is securely connected to both the keyboard and the power source. Try a different USB cable or power source.
- Indicator Light: If the charging indicator light does not illuminate, the battery may be completely depleted or there might be an issue with the cable/port.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Everest |
| Model | KB-BT90 |
| Connectivity | Bluetooth, 2.4GHz Wireless |
| Compatibility | Mac, Windows, Android, iOS |
| Keyboard Layout | Q Layout (Turkish) |
| Power Source | Rechargeable Battery |
| Special Feature | Integrated Phone/Tablet Stand |
| Product Weight | 740 g |
| Package Dimensions | 41.7 x 15.5 x 2.9 cm |
8. Warranty Information
This Everest KB-BT90 Wireless Keyboard comes with a standard manufacturer's warranty. Please refer to the warranty card included in the product packaging or contact your retailer for specific warranty terms and conditions. Keep your proof of purchase for warranty claims.
9. Support
For further assistance, technical support, or inquiries regarding your Everest KB-BT90 Wireless Keyboard, please contact the retailer where you purchased the product or visit the official Everest website for customer service contact information. When contacting support, please have your product model number (KB-BT90) and proof of purchase ready.
