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GravaStar Mercury K1 Pro specifications and in-depth review

GravaStar Mercury K1 Pro

Manufacturer: GravaStar

The GravaStar Mercury K1 Pro is a compact 75% mechanical keyboard built for gaming use, offering a gasket-mounted construction housed in a plastic and aluminum case available in black and gray colorways. It supports wireless and wired operation through Bluetooth 5.0, 2.4GHz wireless, and USB, giving users flexibility in how they connect to their devices. The board ships with hot-swappable switches, making it straightforward to change out switches without soldering, and includes a wrist rest and adjustable feet out of the box.

The Mercury K1 Pro uses GravaStar x Kailh Speedy Mint Linear switches, which feature a 1.2mm actuation point, 45g actuation force, and 3.5mm total travel distance. Its aluminum plate and south-facing RGB backlighting sit beneath PBT double-shot keycaps in a Cherry profile, arranged in a standard ANSI layout. The keyboard supports N-key rollover and includes a USB passthrough port, while media functions are accessible via the Fn key alongside a rotary dial. Polling rate is set at 1000Hz, and battery life is rated at up to 470 hours, backed by a one-year warranty.

Pros
  • Hot-swappable switches allow for easy switch replacement without soldering
  • Tri-mode connectivity via Bluetooth 5.0, 2.4GHz wireless, and USB offers flexible usage options
  • Rated battery life of 470 hours makes wireless use highly practical over extended periods
  • Gasket mount construction provides a softer typing feel by decoupling the plate from the case
  • Includes both a wrist rest and adjustable feet out of the box, adding ergonomic flexibility
  • N-key rollover and a 1000Hz polling rate support accurate and responsive input during gaming
Cons
  • No support for QMK, ZMK, or VIA limits third-party keyboard customization options
  • Media controls are only accessible via the Fn key with no dedicated media keys
  • Weighing 1180g, the keyboard is on the heavier side for a compact 75% form factor
  • Lacks rapid trigger, adjustable actuation, and analog input, which are features increasingly common in gaming-focused keyboards
  • Not designed for Mac users, with no Mac-specific key layout support
Who is this for?

The Mercury K1 Pro is well-suited to gamers and enthusiasts who want a compact 75% layout without sacrificing wireless flexibility, thanks to its tri-mode connectivity and impressive 470-hour battery life. The gasket mount construction and hot-swappable linear switches make it a solid choice for users who appreciate a cushioned typing feel and the ability to experiment with different switches over time. It also works well for those who frequently switch between setups or devices, given its seamless transition between Bluetooth 5.0, 2.4GHz wireless, and USB.

Who is this NOT for?

Users who rely heavily on advanced firmware customization through QMK, ZMK, or VIA will find this keyboard limiting, as none of those platforms are supported. It is also a poor fit for competitive gamers who prioritize features like rapid trigger or adjustable actuation, which are absent here. Additionally, Mac users seeking a tailored layout experience and typists who prefer dedicated media keys over Fn-layer shortcuts may find the Mercury K1 Pro an awkward daily driver.

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 187.6 mm
width 415 mm
thickness 57.6 mm
weight 1180 g
Bluetooth version 5
warranty period 1 years

The GravaStar Mercury K1 Pro is a compact 75% gaming mechanical keyboard with a standard profile and gasket mount construction, measuring 415mm wide, 187.6mm tall, and 57.6mm thick at a weight of 1180g. It supports wireless and wired connectivity through Bluetooth 5.0, 2.4GHz wireless, and USB, with a detachable cable included for wired use. The keyboard operates at a 1000Hz polling rate and offers an impressive 470-hour battery life, making extended wireless sessions practical. It is not designed specifically for Mac, and comes backed by a one-year warranty.

Design:

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

The Mercury K1 Pro features a case constructed from plastic and aluminum in black and gray color options, paired with an aluminum plate for added rigidity. The keyboard includes RGB backlighting with a south-facing LED direction, and comes with both a wrist rest and adjustable feet to accommodate different typing preferences and desk setups.

Switches:

Switch type Mechanical
Switch feel Linear
Hot-swappable switches ✓
Switch name GravaStar x Kailh Speedy Mint Linear
Actuation distance (min) 1.2 mm
Actuation distance (max) 1.2 mm
Actuation force 45 g
Total travel distance 3.5 mm

The Mercury K1 Pro comes equipped with GravaStar x Kailh Speedy Mint Linear mechanical switches, offering a smooth, linear feel with an actuation point of 1.2mm, 45g actuation force, and a total travel distance of 3.5mm. The switches are hot-swappable, allowing them to be replaced without soldering directly on the board.

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 Mercury K1 Pro supports N-key rollover (NKRO) and includes a USB passthrough port, two practical additions for gaming and general use. However, the keyboard does not offer analog input, rapid trigger, dual actuation, or adjustable actuation functionality, nor does it feature an onboard display. It also lacks support for QMK, ZMK, or VIA, meaning customization options are limited to whatever software GravaStar provides natively.

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 Mercury K1 Pro uses a standard ANSI (United States) layout with PBT double-shot keycaps in a Cherry profile, offering a familiar typing experience across a conventional key arrangement. Media controls are accessible via the Fn key rather than dedicated keys, and the board also features a rotary dial for additional input convenience.

Final Verdict

The GravaStar Mercury K1 Pro presents a well-rounded package for users seeking a compact mechanical keyboard with genuine wireless versatility and a thoughtful hardware feature set. Its gasket mount construction paired with hot-swappable linear switches gives it a distinct edge in typing feel and long-term adaptability, while the 470-hour battery life and tri-mode connectivity make it a practical choice for those who move between devices or prefer a cable-free desk. Where it falls short — particularly around firmware openness and advanced actuation features — reflects deliberate trade-offs rather than oversights, and users within its intended audience are unlikely to find those gaps disqualifying. Overall, the Mercury K1 Pro is a capable and ergonomically considered 75% keyboard that delivers most of what everyday gamers and enthusiasts need, provided they can work within its customization boundaries.

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