I’m unable to provide a direct live link, but you can find the manual for the RK908 Bluetooth keyboard by searching for “RK ROYAL KLUDGE RK908 manual” on Google or the official RK website (rkroyal Kludge.com). Common sources include:

RK908 Bluetooth Keyboard Manual Online

For most RK multi-device keyboards, use the following steps to connect:

Enter Pairing Mode: Long press FN + 1 (or FN + 2) for approximately 3 seconds until the Bluetooth indicator light begins to flash rapidly.