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GravaStar Mercury K1 Lite specifications and in-depth review

GravaStar Mercury K1 Lite

Manufacturer: GravaStar

The GravaStar Mercury K1 Lite is a compact 75% mechanical gaming keyboard that combines wireless flexibility with a sturdy gasket-mount construction. Available in four case colors — black, white, pink, and gray — it features an aluminum and plastic build with an aluminum plate, adjustable feet, and an included wrist rest. Tri-mode connectivity via Bluetooth 5.0, 2.4 GHz wireless, and USB gives users a range of options for how they connect to their devices, while the detachable cable adds convenience for wired use.

The keyboard uses GravaStar x BSUN Linear mechanical switches with a 2 mm actuation distance, 40 g actuation force, and 3.6 mm total travel, and the hot-swappable switch sockets allow for straightforward switch replacements without soldering. South-facing RGB backlighting illuminates PBT double-shot keycaps in the Cherry profile across a standard ANSI layout. A rotary dial and Fn-layer media controls are included, and the board supports NKRO and USB passthrough at a 1000 Hz polling rate. Wireless battery life is rated at 470 hours, and the keyboard carries a one-year warranty.

Pros
  • Hot-swappable switches allow for easy switch replacement without soldering
  • Tri-mode connectivity via Bluetooth 5.0, 2.4 GHz wireless, and USB offers flexible setup options
  • Rated battery life of 470 hours provides extended use between charges
  • Gasket mount construction helps absorb typing vibration for a softer feel
  • Includes a wrist rest and adjustable feet out of the box
  • NKRO and USB passthrough are both supported
Cons
  • No support for QMK, ZMK, or VIA, limiting custom remapping and firmware options
  • Media controls are only accessible through the Fn layer rather than dedicated keys
  • Does not support rapid trigger, adjustable actuation, or analog input, which are absent features some users may expect in a gaming keyboard
  • Not designed for Mac users, lacking dedicated Mac key support
Who is this for?

This keyboard suits users who want a compact 75% layout with wireless flexibility, making it a practical fit for those who work across multiple devices or prefer a cleaner desk setup. The tri-mode connectivity and 470-hour battery life support both stationary and on-the-go use without frequent recharging. Gamers or typists who value a smooth linear switch feel with hot-swappable sockets will find the GravaStar x BSUN Linear switches easy to live with and modify over time. The included wrist rest, adjustable feet, and gasket mount also make it a reasonable option for longer typing sessions where comfort and some vibration dampening are valued.

Who is this NOT for?

Users who rely on QMK, ZMK, or VIA for deep keyboard customization will find this board limiting, as none of those firmware options are supported. It is also not well suited to competitive gamers who specifically need rapid trigger or adjustable actuation, since the keyboard lacks those features entirely. Mac users are not well served either, as the board does not include dedicated Mac key support. Additionally, those who prefer a full-size or tenkeyless layout may find the 75% form factor too restrictive if they regularly need a dedicated numpad or more direct access to function row keys.

General info:

Keyboard type Gaming, Mechanical
Keyboard layout size Compact (75%)
Profile Standard
connectivity Wireless & wired
connection type Bluetooth, 2.4GHz wireless, USB
polling rate 1000 Hz
Mount type Gasket mount
Battery life 470 hours
designed for Mac ✕
has a detachable cable ✓
height 156 mm
width 343 mm
thickness 46 mm
weight 850 g
Bluetooth version 5
warranty period 1 years

The GravaStar Mercury K1 Lite is a compact 75% mechanical gaming keyboard with a standard profile and gasket mount construction, measuring 343 × 156 mm with a 46 mm thickness and a weight of 850 g. It supports tri-mode connectivity through Bluetooth 5.0, 2.4 GHz wireless, and USB, and includes a detachable cable for wired use. Wireless operation is backed by a 470-hour battery life, and the keyboard runs at a 1000 Hz polling rate. The unit is not designed specifically for Mac, and it comes with a one-year warranty.

Design:

has RGB lighting ✓
Has a backlit keyboard ✓
Case material Plastic, Aluminum
Plate material Aluminum
Case colors Black, White, Pink, Gray
has adjustable feet ✓
includes a wrist rest ✓
Backlight facing direction South-facing

The keyboard features a backlit design with south-facing RGB lighting, housed in a case made from a combination of plastic and aluminum with an aluminum plate underneath. It is available in four color options — black, white, pink, and gray — giving users some variety in how the board looks on a desk. Adjustable feet allow for typing angle customization, and a wrist rest is included in the package.

Switches:

Switch type Mechanical
Switch feel Linear
Hot-swappable switches ✓
Switch name GravaStar x BSUN Linear
Actuation distance (min) 2 mm
Actuation distance (max) 2 mm
Actuation force 40 g
Total travel distance 3.6 mm

The keyboard ships with GravaStar x BSUN Linear mechanical switches, offering a smooth, linear feel with a 2 mm actuation distance, 40 g actuation force, and a total travel distance of 3.6 mm. The sockets are hot-swappable, meaning the switches can be removed and replaced without soldering.

Features:

has analog input ✕
has rapid trigger ✕
has dual actuation ✕
has adjustable actuation ✕
has NKRO ✓
has USB passthrough ✓
Has a display ✕
has QMK support ✕
has ZMK support ✕
has VIA support ✕

The keyboard supports NKRO (N-key rollover) and includes a USB passthrough port, making it straightforward to connect additional peripherals directly to the board. It does not offer analog input, rapid trigger, dual actuation, or adjustable actuation, and there is no built-in display. On the software side, QMK, ZMK, and VIA are not supported, so remapping and firmware customization are limited to whatever native configuration options the keyboard provides.

Keys & layout:

Keyboard layout ANSI (United States)
Keycap type PBT, Double-shot
Keycap profile Cherry
uses a standard key layout ✓
Media keys Via Fn key
has a rotary dial ✓

The keyboard uses a standard ANSI (United States) layout with PBT double-shot keycaps in the Cherry profile, providing a familiar and widely compatible key arrangement. Media controls are accessible via the Fn key rather than dedicated keys, and a rotary dial is included for additional input convenience. The layout follows a standard key arrangement, which makes keycap replacement straightforward.

Final Verdict

The GravaStar Mercury K1 Lite is a well-rounded compact mechanical keyboard that brings together tri-mode wireless connectivity and a 470-hour battery life in a 75% form factor with gasket mount construction and hot-swappable linear switches. It covers the practical needs of users who want a versatile, comfortable daily driver without being tied to a cable, and the inclusion of a wrist rest and adjustable feet adds genuine ergonomic value out of the box. Where it falls short is in customization depth — the absence of QMK, ZMK, VIA support, and advanced actuation features means it is better suited to mainstream users than to those seeking a fully programmable or competition-focused setup. Overall, the Mercury K1 Lite presents a cohesive package for typists and casual to moderate gamers who prioritize wireless freedom and build quality over deep firmware control.