Leobog K21 NumPad

The LEOBOG K21 NumPad is a compact 21-key numeric keypad designed for users who want flexible connectivity and easy switch customization. It fits well for office workers or hobbyists who need a dedicated numpad with wireless and wired options, plus the ability to swap mechanical switches without soldering. Its small size and multi-mode connection make it suitable for both desktop setups and portable use.

Key Features

• Triple connectivity modes: Bluetooth 5.0, 2.4GHz wireless, and Type-C wired, allowing seamless switching between devices or connection types.
• Hot-swappable PCB supports most 3-pin and 5-pin mechanical switches, enabling users to change switches easily for different typing feels.
• Includes EVA foam inside the case to reduce typing noise and dampen bottom case sound, improving acoustic comfort.
• White or RGB backlighting options enhance visibility in low-light environments.

Build Quality and Typing Experience

• PC (polycarbonate) mounting plate offers a softer, more flexible typing feel compared to metal plates, which may suit users preferring less rigid feedback.
• Plate-mounted stabilizers help reduce key wobble on larger keys for more consistent keypresses.
• Pre-lubed linear switches with moderate actuation force provide a smooth, quiet keystroke suitable for office or home use.
• Compact form factor (12 x 8.2 cm) keeps desk space minimal.

Connectivity

• Bluetooth 5.0 allows wireless use with compatible devices, though latency and connection stability depend on environment.
• 2.4GHz wireless mode uses a dedicated receiver for potentially lower latency and more stable connection than Bluetooth.
• Type-C wired mode ensures zero latency and no battery dependence during extended use.
• 600mAh battery supports up to 50 hours of use, though actual battery life varies with backlight and usage.

Compatibility

• Supports Windows and macOS systems, covering most desktop and laptop users.
• NKRO (N-key rollover) prevents missed keypresses during fast typing or multiple simultaneous inputs.

Trade-offs

• Limited to a 21-key numeric layout, so it is not suitable for users needing full keyboard functionality.
• PC mounting plate may not provide the firmer typing feedback preferred by some mechanical keyboard enthusiasts.
• White or RGB backlight options are available, but lighting customization details are unknown.
• Unknown firmware or key remapping support limits advanced customization possibilities.