SI-2689是一款2.4G、蓝牙(BLE5.1三通道)和有线3模104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1作距离。
- 时尚的全透明外观设计，采用Gasket结构，提供细腻软弹的按键手感。
- 键帽（选配）和机械开关（选配）均支持热插拔，用户可自由选购市面上各品牌开关及个性化键帽进行DIY改装。
- 键盘用料扎实，按键反应灵敏。
- 键盘右上角配备1.14英寸TFT显示屏，功能丰富多样，可配合专用驱动进行DIY；右上角设有旋钮和按键，可与TFT屏幕联动，旋转旋钮可调节菜单，短按旋钮可确认选项并返回上一级菜单。
- TFT屏幕支持时间和日历显示；出厂时或平时关闭底部电源开关后，需重新打开电源开关并通过驱动校准时间和日历。
- TFT屏幕集成电量显示功能，充电状态与剩余电量一目了然。
- 在TFT屏幕滚动至“灯光亮度”模式，可切换5档亮度调节，每档亮度增量为20%；顺时针旋转旋钮增加亮度，逆时针旋转旋钮降低亮度。
- 在TFT屏幕滚动至“灯光速率”模式，可切换5档速率调节，每档速率增量为20%；顺时针旋转旋钮加快灯光速度，逆时针旋转旋钮减慢灯光速度。
- 在TFT屏幕滚动至“音量调节”模式，顺时针旋转旋钮调大音量，逆时针旋转旋钮调小音量，屏幕上对应音量大小图标会同步闪动。
- 在TFT屏幕滚动至“自定义图片”选项，可通过专用驱动上传并设置自定义图片。
- 配合专用驱动支持音乐律动RGB灯效。
- 有线模式与2.4G模式下，配合驱动可实现全键自定义功能及宏定义，驱动支持自定义1600多万种颜色。
- 键盘采用人性化设计，与Fn键配合提供一系列常用快捷功能按键。
- 底部设有时尚铭牌，内置隐藏式独立2.4G接收器收纳仓。
- 长按Fn+Esc键3秒可恢复出厂默认设置并显示开机画面，已配对的蓝牙设备不会被清除。
- 键盘各项功能状态均有对应指示灯指示，同时TFT屏幕主菜单上的对应图标也会同步高亮显示。
- 蓝牙/2.4G模式下，键盘5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。
- 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。
- 配备独立电池舱，内置两个4000mAh大容量可循环充电锂电池，带有独立电源开关，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。
- 支持滚轮双模式功能：按下Fn+滚轮按键可切换滚轮功能为调节屏幕/调节音量；Fn+Esc恢复默认后，滚轮默认调节屏幕，再次按下Fn+滚轮按键则切换为调节音量功能。
- 按键开关寿命经测试可达6000万次。
- Stylish fully transparent appearance design with Gasket mount, delivering a smooth and bouncy typing feel.
- Both keycaps (optional) and mechanical switches (optional) 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 highly responsive keystrokes.
- Equipped with a 1.14-inch TFT display on the top right corner with versatile functions, customizable via dedicated software. A knob and button are also located on the top right, which work in conjunction with the TFT screen: rotate the knob to navigate menus, and short-press the knob to confirm selections and return to the previous menu.
- The TFT display supports time and calendar display. After factory reset or turning off the bottom power switch during daily use, you need to turn on the power switch and calibrate the time and calendar via dedicated software.
- The TFT display features an integrated battery level indicator, showing charging status and remaining battery level clearly at a glance.
- Scroll to “Backlight Brightness” mode on the TFT display to adjust 5-level brightness (20% per level). Rotate the knob clockwise to increase brightness and counterclockwise to decrease brightness.
- Scroll to “Backlight Speed” mode on the TFT display to adjust 5-level speed (20% per level). Rotate the knob clockwise to speed up backlight effects and counterclockwise to slow them down.
- Scroll to “Volume Control” mode on the TFT display. Rotate the knob clockwise to increase volume and counterclockwise to decrease volume, with the corresponding volume icon flashing on the screen.
- Scroll to “Custom Image” option on the TFT display to upload and set custom images via dedicated software.
- Music-sync RGB lighting effects are available via dedicated software.
- Full key customization and macro programming are supported in wired and 2.4G modes via dedicated software, which also allows customization of over 16 million colors.
- User-friendly design with a range of common shortcut functions accessible via the Fn key.
- Features a stylish nameplate on the bottom and a built-in hidden dedicated storage compartment for the 2.4G wireless receiver.
- Press and hold Fn+Esc for 3 seconds to restore factory default settings and display the boot screen. Previously paired Bluetooth devices will remain saved.
- All keyboard functions have corresponding indicator lights, and the corresponding icons on the TFT main menu will also be highlighted simultaneously.
- Auto power-saving mode activates after 5 minutes of inactivity in Bluetooth/2.4G mode; wake up the keyboard with a single keystroke.
- Firmware update requires wired mode. After the update is complete, please re-plug the USB cable and toggle the keyboard power switch off and on.
- Keyboard polling rate: 1000Hz (Wired mode), 1000Hz (2.4G mode), 125Hz (Bluetooth mode).
- Equipped with an independent battery compartment, built-in two 4000mAh high-capacity rechargeable lithium-ion batteries with an integrated power switch for energy saving and extended battery life.
- Equipped with Type-C interface for more reliable connection, stable performance and faster charging.
- Dual-mode scroll wheel function: Press Fn+scroll wheel button to switch the scroll wheel function between screen adjustment and volume control. After restoring defaults via Fn+Esc, the scroll wheel defaults to screen adjustment; press Fn+scroll wheel button again to switch to volume control.
- Mechanical switch lifespan tested to 60 million keystrokes.