VTER K20 Wireless Mechanical Numeric Keypad User Manual

Introduction

The YANFU VTER K20 is a versatile 20-key wireless mechanical numeric keypad designed for enhanced productivity across various platforms. It features a unique gasket structure for a comfortable typing experience, full key hot-swappability for easy switch customization, and dynamic RGB backlighting. With its three-mode connection capability (Bluetooth, 2.4G wireless, and wired Type-C), the K20 offers seamless integration with Windows, macOS, Android, and iOS devices.

Image: The VTER K20 numeric keypad showcasing two color options, Wisteria (purple) and Celadon (white), highlighting its compact design and key layout.

Package Contents

Please check the package for the following items:

• VTER K20 Mechanical Numeric Keypad
• USB Type-C Cable
• 2.4G Wireless Receiver
• User Manual (this document)
• Keycap Puller (may be included for hot-swappable models)
• Switch Puller (may be included for hot-swappable models)

Key Features

• Three-Mode Connection: Supports Bluetooth, 2.4G wireless, and wired (Type-C) connections for maximum flexibility.
• Gasket Structure Design: Provides a soft and elastic typing experience, enhancing comfort and sound.
• Full Key Hot-Swappable: Allows users to easily change mechanical switches without soldering, compatible with most common 3-pin and 5-pin switches.
• Customizable RGB Backlight: Features 16 million colors and 46 sets of cool lighting effects, with customization options via QMK/VIA software.
• Aluminum Alloy Knob: A multi-functional rotary knob for volume control or other programmable actions.
• 20-Key Layout: Compact numeric keypad with essential keys for data entry and calculations.
• PBT Keycaps: Durable, two-color sublimation PBT keycaps with a fine, dry texture that resists shine over long-term use.
• Multi-System Compatibility: Works seamlessly with Windows (7/8/9/10/11), macOS, Android, and iOS operating systems.
• Long Battery Life: Equipped with a 1550mAh battery for extended wireless usage.

Image: Visual summary of the VTER K20's main features, including its three-mode connectivity, gasket structure, hot-swappable switches, RGB lighting, aluminum knob, and 1550mAh battery.

Image: An exploded view diagram illustrating the internal components and gasket structure of the VTER K20, highlighting layers such as keycaps, mechanical switches, PCB, and sound dampening materials.

Setup and Connection

The VTER K20 numeric keypad supports three connection modes: Wired, 2.4G Wireless, and Bluetooth. You can switch between these modes to connect to different devices.

1. Wired Connection

1. Locate the USB Type-C port on the keypad.
2. Connect one end of the provided USB Type-C cable to the keypad and the other end to an available USB port on your computer.
3. The keypad will be automatically recognized by your system and is ready for use.

2. 2.4G Wireless Connection

1. Locate the 2.4G wireless receiver (USB dongle) in your package.
2. Plug the 2.4G receiver into an available USB port on your computer.
3. On the keypad, switch the connection mode to 2.4G (usually indicated by a switch or key combination).
4. The keypad should connect automatically. If not, ensure the receiver is properly inserted and the keypad is in 2.4G mode.

3. Bluetooth Connection

The VTER K20 can connect to up to three Bluetooth devices simultaneously.

1. On the keypad, switch the connection mode to Bluetooth (usually indicated by a switch or key combination, e.g., BT1, BT2, BT3).
2. For first-time pairing, press and hold the designated Bluetooth pairing key (refer to specific keycap legends if available, often Fn + a number key) until the indicator light flashes rapidly, indicating pairing mode.
3. On your device (computer, tablet, phone), go to Bluetooth settings and search for new devices.
4. Select "VTER K20" (or similar name) from the list of available devices to pair.
5. Once paired, the indicator light on the keypad will stop flashing and remain solid.
6. To switch between paired Bluetooth devices, simply press the corresponding Bluetooth channel key (e.g., BT1, BT2, BT3).

Image: The VTER K20 keypad demonstrating its ability to connect to a desktop computer via wired connection, and laptops via 2.4G wireless and Bluetooth, highlighting its multi-device compatibility.

Operation

Basic Key Functions

The VTER K20 functions as a standard numeric keypad. Keys include numbers 0-9, arithmetic operators (+, -, *, /), decimal point, Enter, and a dedicated NUM key for toggling number lock.

RGB Backlighting

The keypad features a full-color RGB backlight with 46 built-in lighting effects. You can cycle through these effects and adjust brightness/speed using specific key combinations (refer to the keypad's keycap legends or a quick start guide if provided). For advanced customization, including creating your own lighting effects, the keypad supports QMK/VIA software.

Image: The VTER K20 keypad illuminated with vibrant RGB backlighting, emphasizing the "lower light slot" design and customizable lighting effects.

Knob Functionality

The aluminum alloy knob typically controls system volume by default. Rotate it clockwise to increase volume, counter-clockwise to decrease volume, and press it to mute/unmute. Its function can be customized using QMK/VIA software.

QMK/VIA Customization

The VTER K20 supports QMK/VIA open-source firmware, allowing for extensive customization of key assignments, macros, and RGB lighting effects. To use VIA:

1. Download the VIA software from the official website.
2. Connect the VTER K20 to your computer via the USB Type-C cable.
3. Launch the VIA software. It should automatically detect the keypad.
4. You can now remap keys, create macros, and adjust RGB settings through the intuitive graphical interface.

Image: A visual representation of the VIA software interface, demonstrating how users can customize key layouts, macros, and RGB lighting effects for their VTER K20 keypad.

Maintenance

Cleaning the Keypad

• General Cleaning: Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe the surface of the keypad. Avoid excessive moisture.
• Keycap Cleaning: For deeper cleaning, you can remove the keycaps using a keycap puller. Wash them gently with mild soap and water, rinse thoroughly, and ensure they are completely dry before reattaching.
• Between Keys: Use compressed air to remove dust and debris from between the keycaps and switches.

Replacing Switches (Hot-Swappable Feature)

The VTER K20 features hot-swappable switches, allowing you to change them without soldering.

1. Remove Keycap: Use a keycap puller to gently remove the keycap from the switch you wish to replace.
2. Remove Switch: Use a switch puller to carefully grip the top and bottom clips of the switch and pull it straight up. Avoid wiggling to prevent damaging the PCB socket.
3. Insert New Switch: Align the pins of the new switch with the holes on the PCB. Gently push the switch down until it clicks into place. Ensure the pins are straight before inserting to prevent bending.
4. Reattach Keycap: Place the keycap back onto the new switch.

Image: A detailed view of the VTER K20's hot-swappable design, showing individual mechanical switches being inserted and removed, illustrating the ease of customization.

Troubleshooting

Keypad Not Responding

• Wired Mode: Ensure the USB Type-C cable is securely connected to both the keypad and the computer. Try a different USB port or cable.
• 2.4G Wireless Mode: Ensure the 2.4G receiver is firmly plugged into a USB port. Verify the keypad is switched to 2.4G mode. Try re-pairing by unplugging and replugging the receiver, then restarting the keypad.
• Bluetooth Mode: Check if Bluetooth is enabled on your device. Ensure the keypad is in the correct Bluetooth channel (BT1/BT2/BT3) and is paired. Try unpairing and re-pairing the device.
• Battery: If in wireless mode, check the battery level. Connect the keypad via USB-C to charge it.

RGB Backlight Not Working or Incorrect

• Check if the backlight is turned off or set to minimum brightness via key combinations.
• If using QMK/VIA, ensure the lighting settings are correctly configured and applied.
• Try resetting the keypad to factory defaults (refer to specific key combinations in a quick start guide if available).

Keys Double-Typing or Not Registering

• This could indicate a faulty switch. Utilize the hot-swappable feature to replace the problematic switch.
• Ensure the switch is fully seated in its socket.

Specifications

Image: A table detailing the VTER K20's product parameters, such as dimensions, battery capacity, connection methods, and supported operating systems.

Image: A table providing detailed specifications for the Huajun axis mechanical switches used in the VTER K20, including materials, spring, and force measurements.

User Tips

• Maximize Customization: Explore the QMK/VIA software to fully customize key mappings, macros, and RGB lighting to suit your workflow and preferences.
• Experiment with Switches: Take advantage of the hot-swappable feature to try different mechanical switches and find the typing feel that best suits you.
• Battery Management: For optimal battery life, remember to switch off the keypad when not in use, especially when using wireless modes.

Warranty and Support

The VTER K20 Numeric Keypad comes with a standard manufacturer's warranty against defects in materials and workmanship. Please retain your proof of purchase for warranty claims.

For technical support, troubleshooting assistance, or warranty inquiries, please contact the seller or manufacturer directly through their official support channels. Refer to your purchase documentation for specific contact information.