Magnesium alloy body
A magnesium alloy body at 65 ± 3 g (8K) or 64 ± 3 g (4K), curved and ergonomic with PTFE feet; Huano switches rated for 80 million clicks.

An all-round mouse with a PixArt 3950 / 3395 sensor, wired or wireless.
A magnesium alloy body at 65 ± 3 g (8K) or 64 ± 3 g (4K), curved and ergonomic with PTFE feet; Huano switches rated for 80 million clicks.
The 8K version uses a PixArt 3950 (50–30,000 DPI, 750 IPS) with six steps from 125 to 8000 Hz; the 4K version a PixArt 3395 (up to 26,000 DPI) with five steps up to 4000 Hz. Motion Sync is supported.
Bluetooth, 2.4 GHz and USB-C. The 600 mAh battery lasts up to 140 hours over Bluetooth on the 8K version, or about 135 hours at 1K on the 4K version. The Launcher web app remaps buttons, records macros and sets LOD, polling rate and DPI, with 5 onboard profiles.
Summarized from the Keychron website; figures as published by Keychron.
Specs are from the brand's website, which takes precedence if anything differs.