Since no official P47 driver exists, you need to ensure your Bluetooth hardware is correctly recognized. Here is the approach for Windows 7.
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A user named AudioPhile_99 had posted a comment twelve years ago. “The official link is dead. Use the Wayback Machine. Here is the archived driver link. It works, but disable your antivirus while installing or it will flag the .sys file.” p47 wireless headphones driver windows 7 link
Windows 7 requires a full reboot for Bluetooth stack updates. Restart your PC even if the installer does not prompt you. Since no official P47 driver exists, you need