The TD-07's Bluetooth feature is designed to receive audio, similar to how Bluetooth-equipped headphones pair with a smart device. Bluetooth earphones, headphones, and speakers are not supported and cannot be used. Use wired earphones, headphones, or speakers instead.
The TD-07's Bluetooth feature is primarily used for streaming music wirelessly from your smartphone, allowing you to play along with it. For details, refer to "Performing Along with a Song from Your Smartphone" in the TD-07 Owner's Manual.