Category Specification / Detail Model / Name GravaStar Mercury V75 Lite Layout / Keys 75% layout / 81 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 polycarbonate shell with metal-style design Mounting / Structure Gasket-mount design with multi-layer sound-damping Dimensions 335 × 145 × 45 mm Weight (with battery) ~0.9 kg 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 rechargeable battery Battery Life Up to 20 hours (RGB on) / 600+ hours (RGB off) Charging / Input DC 5V, 1200 mA (USB-C port) Backlighting / RGB Per-key RGB with 13 lighting modes Software / Features Custom key mapping, macro recording, lighting control via software Extras Built-in 2.4 GHz dongle slot, dual-angle adjustable feet, transparent shell aesthetic System Support Windows / macOS Warranty / Compliance Limited manufacturer warranty (region dependent)