To obtain Wireless Planning & Coordination (WPC) approval for Bluetooth headphones, you will need to follow the guidelines and procedures set by the WPC, which is a regulatory body responsible for managing radio frequency spectrum in India.

First, you need to determine the appropriate category for your Bluetooth headphones under the WPC regulations. The WPC has different categories for radio frequency devices, and your Bluetooth headphones will likely fall under the "low power device" category.

Next, you will need to obtain a Type Approval for your Bluetooth headphones from the WPC. This requires submitting an application and required documents to the WPC, including a technical description of the device, test reports, and a copy of the user manual.

Once your application is approved, you will need to obtain a frequency allocation from the WPC. This ensures that your device operates on an assigned frequency that does not interfere with other wireless devices.