SI-2699是一款2.4G、蓝牙(BT3.0/BLE5.0三通道)和有线3模67键机械键盘。支持连接5个设备，有线模式符合USB 1.1版本及其以上版本协议,适用于各种PC端。2.4G和蓝牙符合ISM（工业、商业、医疗业）频段自动跳频要求，有效避免无线装置之间相互干扰的问题。2.4G和蓝牙传输10米无障碍可视操作距离
- 时尚的外观设计，67键布局，Gasket结构，手感细腻软弹。
- 键帽和机械开关可插拔，用户也可以购买市面上各品牌开关和个性化键帽自由DIY。
- 键盘用料扎实，按键反应灵敏。
- 隐藏式独立2.4G接收器收纳仓。
- FN+\|组合键可切换15种RGB灯效及关闭状态，共16种灯效模式。
- 配合专用驱动支持音乐律动RGB灯效，该模式下有10种灯效可选。
- 将键盘开关拨至右侧即可切换至2.4G模式。
- CAPS键下方设有白色指示灯，用于指示大小写锁定状态。
- 蓝牙/2.4G模式下，键盘一分钟无任何操作自动进入省电模式，单击任意按键即可唤醒。
- 通过蓝牙连接键盘时，可在电脑端查看键盘剩余电量。
- 键盘刷写固件补丁需切换至有线模式，刷写完成后请重新插拔USB线并重启键盘电源开关。
- 键盘回报率：有线模式1000Hz，2.4G模式1000Hz，蓝牙模式125Hz。
- 可选配内置4000mAh或8000mAh容量可循环充电锂电池，配备独立电源开关，环保节能，有效延长续航时间。
- 采用Type-C接口，连接更可靠，性能更稳定，充电速度更快。
- 配合专用驱动可调节5档键盘响应速度。
- 配合专用驱动在基础自定义功能之上额外增加3层自定义功能：支持双FN层编辑，实现单键双组合功能；新增TAP层实现一键两用，共计4层自定义功能。
- 按键开关寿命经测试可达6000万次。
- 充电时间：4000mAh版本约5-7小时，8000mAh版本约9-10小时。
- Sleek and stylish design with 67-key layout and Gasket mount, delivering a smooth and bouncy typing feel.
- Both keycaps and mechanical switches are hot-swappable, allowing users to freely customize with switches and personalized keycaps from various brands on the market.
- Premium build quality with solid materials and responsive keystrokes.
- Built-in hidden storage compartment for the standalone 2.4G wireless receiver.
- Switch between 15 RGB lighting effects and off mode via the FN+\| key combination, totaling 16 lighting modes.
- Music-sync RGB lighting is available with dedicated software, with 10 lighting modes to choose from in this mode.
- Toggle the keyboard switch to the right to activate 2.4G wireless mode.
- A white indicator light under the CAPS key indicates the caps lock status.
- Auto power-saving mode activates after 1 minute of inactivity in Bluetooth/2.4G mode; wake up the keyboard with a single keystroke.
- Battery level can be displayed on your computer when the keyboard is connected via Bluetooth.
- Firmware update requires wired mode. After the update is complete, please re-plug the USB cable and restart the keyboard via the power switch.
- Keyboard polling rate: 1000Hz (Wired mode), 1000Hz (2.4G mode), 125Hz (Bluetooth mode).
- Optional built-in 4000mAh or 8000mAh rechargeable lithium-ion battery with independent power switch for energy saving and extended battery life.
- Equipped with Type-C interface for more reliable connection, stable performance and faster charging.
- 5-level adjustable keyboard response speed via dedicated software.
- Dedicated software adds 3 extra layers of customization on top of the basic functions: supports dual FN layer editing for single-key dual-combination functions; adds TAP layer for one-key dual-purpose functionality, totaling 4 layers of customization.
- Mechanical switch lifespan tested to 60 million keystrokes.
- Charging time: Approx. 5-7 hours for 4000mAh version, approx. 9-10 hours for 8000mAh version.