Features: Ultra-narrow column layout: The 81-key ultra-narrow column layout design saves desktop space and adapts to various usage environments. Gastek structure design: The innovative Gastek structure design provides a pure key sound, making the keyboard tapping like a feast. Three-mode connection: Supports BT, wired, and 2.4G three connection modes to meet the needs of different usage scenarios and supports seamless switching. High-end custom design: Adopt the design language of high-end custom keyboards, perfectly integrate the "copper pillar" technology with K8, and provide an unlimited disassembly cycle. Large-capacity battery: Built-in 4000mAh large-capacity battery, can be used for up to 190 hours in the light-off interval. Noise reduction design: The internal structure design adds a dead-angle-free interlayer sound insulation cotton, greatly reducing the noise and cavity sound generated when tapping the axis, ensuring pure and comfortable keyboard tapping. Lighting system: 1680W color, driver-adjusted exclusive lighting system, 18 lighting modes, DIY custom dazzling lighting effects. Specification: Optional color: Blue&Black / White&Gray Material: ABS Keys: 81 Shaft Life: 80,000,000 times Hot Swap: Full key support Battery capacity: 4000mAh Attended mode: Wireless2.4G/BT5.0/Wired Product size: 333mm(L)*143.7 mm(W)*41.3 mm(H) Product weight: 942土20G Package size: 37*18.2*5.5cm Package weight: 1200g Package list: 1* Keyboard 1* User manual 1* Data cable 1* Shaft puller / Key puller