The (also identified as EB-RK908 or Tecphile RK908 ) is a dual-channel mechanical Bluetooth keyboard designed for mobile devices, tablets, and PCs. While a direct PDF download link for the RK908 manual is not hosted on the manufacturer’s primary manual repository, the following guide provides the essential setup and pairing instructions compiled from the product's official specifications and quick-start documentation. Rii RK908 Quick Setup Guide 1. Bluetooth Pairing Instructions
| Key Combination | Function | | --- | --- | | Fn + Q / W / E | Switch between Bluetooth devices 1/2/3 | | Fn + 1 / 2 / 3 (hold) | Pair new device on that channel | | Fn + Z / X / C | Toggle between Windows / Mac / iOS layouts | | Fn + Left Shift | Toggle Backlighting On/Off | | Fn + Up / Down | Increase / Decrease Backlight Brightness | | Fn + Left / Right | Change Backlight Effect Mode | | Fn + Tab | Toggle Gaming Mode (disable Win key) | | Fn + Spacebar (hold 3s) | Factory Reset | | Fn + Enter | Battery level check (LEDs flash 1–4 times) | | Fn + P | Enter low-power mode | | Fn + Backspace | Lock/unlock the keyboard (child lock) | rk908 bluetooth keyboard manual link