Get started with Rainy 75 in just a few minutes.
This section covers basic connection methods, OS layout switching, and battery level checking — enough to get you typing right away.
Rainy 75 supports three connection modes: Wired, 2.4GHz wireless, and Bluetooth.
Use Fn + Tab to cycle between modes. The active mode is indicated by the LEDs near the top row.
Please follow the steps below to use the keyboard in 2.4 GHz wireless mode.
Fn + Tab until the ESC indicator is selected.💡 Wired mode provides the most stable connection and is recommended for firmware updates.
Fn + Tab until the F4 indicator blinks.💡 Note
For best wireless performance:
- Keep the dongle away from USB 3.0 devices and other 2.4GHz interference sources (such as routers).
- Using a USB extension cable often improves signal stability.
- Optimal distance between keyboard and dongle is within 15 cm.
Rainy 75 supports up to three BT devices.
Fn + Tab to select F1, F2, or F3 (the indicator will blink).Fn + F1 / F2 / F3 to enter pairing mode.(Rapid flashing indicates pairing is active).Bluetooth Channel Mapping
| Bluetooth Slot | Key Combination | Device Name |
|---|---|---|
| Channel 1 | Fn + F1 |
Rainy75-1 |
| Channel 2 | Fn + F2 |
Rainy75-2 |
| Channel 3 | Fn + F3 |
Rainy75-3 |
The keyboard is set to Windows mode by default.
Press and hold Fn + M for 3 seconds to switch between Windows and macOS layouts.
The keyboard will automatically apply the correct key mapping.
💡This setting is stored on the keyboard and does not require software.
Battery level can be checked directly from the keyboard.
Display behavior differs between RGB and Non-RGB versions.
Fn + Space.| Keys Lit | Battery Level |
|---|---|
| 🔴 1–3 | Below 40% |
| 🟡 1–7 | 40%–79% |
| 🟢 1–0 | 80%–100% |
- ach number key represents 10%.
- All keys lit indicates a full charge.
Fn + Space.ESC to F4 will light up.| Indicators Lit | Battery Level |
|---|---|
🔴 ESC–F1 |
Below 40% |
🟡 ESC–F3 |
40%–59% |
🟢 ESC–F4 |
60%–100% |