Deactivating the Bluetooth function to reduce radiation is not directly possible by completely deactivating the Bluetooth function. However, you can prevent the device from constantly searching for Bluetooth connections or remaining active by carrying out the following steps:

- Ensure that no Bluetooth devices are paired or actively connected.
- Switch the device to standby mode when it is not in use. The device has an automatic energy-saving function that switches it to standby mode within 10 minutes if no audio signal has been received or no operation has taken place.

However, there is no specific option to completely deactivate the Bluetooth function to avoid radiation.