Category Specification / Detail Model / Name GravaStar Mercury K1 Lite Layout / Keys 75% / 80 keys Switch Type GravaStar × BSUN linear mechanical switches (hot-swappable) Actuation Force / Travel ~40 gf actuation; ~2.0 mm pre-travel, ~3.6 mm total travel Frame / Material Transparent / skeletal PVC housing Mounting / Structure Gasket-mount / multi-layer sound-damping (5 layers) Dimensions 343 × 156 × 46 mm (13.50" × 6.14" × 1.81") Weight (with battery) ~0.85 kg / 1.87 lb Connectivity Modes Tri-Mode: 2.4 GHz wireless, Bluetooth 5.0, Wired USB-C Wireless / BT Details Bluetooth 5.0, supports up to 3 paired devices Battery / Power 4000 mAh internal rechargeable battery Battery Life Up to 20 hours with lighting on; up to 666 hours with lights off Charging / Input DC 5V, 1200 mA (USB-C interface) Backlighting / RGB Per-key RGB with 13 lighting modes Software / Features Key remapping, macro support, lighting customization (Windows software) Extras Built-in dongle storage, dual-stage feet, transparent shell design System Support Windows and macOS Warranty / Compliance Limited warranty (varies by region)