Keychron launches K3 HE and K3 Ultra 8K low-profile 75% keyboards

Keychron launched two new low-profile 75% K3 keyboards on Kickstarter that deliberately split their hardware priorities: the K3 HE centers on magnetic Hall-effect actuation and per-keystroke customization, while the K3 Ultra 8K chases ultra-low-latency wireless with an 8,000 Hz polling claim. The campaign went live February 17, 2026, with PRWeb noting a general “starting at $109.99” backer tier and Notebookcheck reporting first-day funding that exceeded a $10,000 goal and raised over $55,000; both boards are projected to begin shipping in May 2026.

The K3 HE is billed as the first K3 magnetic-switch keyboard and ships with Keychron “Ultra-fast Lime Low-Profile” magnetic switches and an HE PCB, according to PRWeb and Notebookcheck. Keychron positions the HE for gamers, programmers, and power users who want finer control over actuation behavior; Notebookcheck lists an early-bird Kickstarter price of $115 for the HE and shows color variants in white and black in PRWeb’s image captions. No numeric actuation-adjustability bands were published in the launch materials.

Keychron’s K3 Ultra 8K targets latency-sensitive workflows with an 8,000 Hz wireless polling headline and a specific input-response claim of “as low as 0.125 milliseconds,” a figure reported by Forbes. Forbes also quotes an endurance claim of up to 550 hours on a single charge in 2.4 GHz mode when using ZMK firmware; Notebookcheck’s spec table lists a 2600 mAh battery capacity for the K3 family but does not map that capacity to the hour figure. Notebookcheck identifies the Ultra’s default low-profile mechanical options as Keychron Milk POM Red (linear), Brown (tactile), and Banana (sharp tactile), noting those Milk POM switches are pre-lubed, and lists a hot-swap PCB supporting 3-pin and 5-pin Gateron Low-Profile 2.0 switches for the mechanical model.

Both models share a travel-ready slim 75% layout and a minimalist metal chassis with natural rosewood endplates, PRWeb and Notebookcheck state. Notebookcheck’s technical table records an aluminium plate, ABS bottom case, aluminium rails, dimensions of 126 × 318.62 mm with a 20.5 mm front height, weight of 575 g, double-shot PBT LSA-profile non-shine-through keycaps, and typing angles of 2°, 4.5°, and 7.5°. Connectivity includes USB Type-C, 2.4 GHz wireless, and Bluetooth 5.3, and Keychron Launcher is cited as the web-based customization UI.

Community reaction surfaced immediately: a Reddit r/Keychron thread captured a buyer weighing HE rapid-trigger tuning versus the Ultra’s plug-and-play 8K latency for casual CS2 play, asking whether HE yields noticeable in-game gains or causes mis-presses in daily use. Keychron co-founder Paul Tan framed the product split in the launch: “Our goal with these releases is to reduce friction between intent and action. Input can be tuned for precision or respond with ultra-low latency during extended wireless use, depending on how the keyboard is configured.” Notebookcheck also reported prospective retail MSRPs near $110 for the HE and $120 for the Ultra, while Kickstarter early-bird tiers were reported at $105 for the Ultra and $115 for the HE; backers and reviewers will see whether the May 2026 shipments validate the 8K latency and 550-hour endurance claims.