Built-in audio is a speaker system inside a sauna or red light therapy device. It lets you listen to music, a podcast, white noise, or nature sounds while you use the device. On some models, the sounds are already stored in the unit. On others, you connect a phone by Bluetooth and play whatever you want.
The main point is simple: audio can make a session feel less boring or more relaxing. It does not create the heat or red light. It also does not make the therapy stronger. You can use the device with sound, or you can use it in silence.
What does built-in audio mean?

“Built-in audio” usually means the speaker is part of the sauna or red light device. You do not need to place a separate speaker next to it. However, the exact controls are different from one model to another.
A unit may offer one or both of these options:
- Built-in sounds: The device already has sounds such as rain, waves, birds, a stream, or soft music.
- Phone playback: You connect a phone by Bluetooth, then choose music, a podcast, or another audio file on the phone.
If you use phone playback, the phone still needs Wi-Fi, mobile data, or a downloaded file. Bluetooth only sends the sound from the phone to the speaker. Before you begin, check the product page or manual because not every model has the same audio controls. For a technical overview of the connection, see the Bluetooth SIG's overview of wireless audio streaming.
Music, podcasts, or white noise: which should you choose?
There is no single best choice. Pick the sound that helps you stay comfortable and finish the session without distraction.
Choose music when you want familiar sound
Music is a good choice if silence feels dull. A calm playlist may fit a quiet session. More active music may help if you use red light therapy before a workout or during a morning routine.
Make a short playlist before you begin. This stops you from touching the phone again and again. Try to make the playlist at least as long as the planned session.
Choose a podcast when you want something to follow
A podcast can make the time pass faster. It works best when the episode is easy to hear and does not require you to look at the screen.
Download the episode before the session if your Wi-Fi is weak near the device. Start the episode first, set the volume, and then begin the sauna or red light session. Remember that the podcast ending does not turn off the heat or light. The audio and the session timer are separate.
Choose white noise when you want steady background sound
White noise is a steady sound. Rain, waves, birds, and a crackling fire are nature sounds, not always true white noise, but people often use them for the same reason: simple background sound without a story or lyrics.
Choose this option if voices or changing songs pull your attention away. Keep the sound low enough that it stays in the background.
The choices depend on the device. For example, the BestQool Sauna Red Light Therapy panel offers wireless playback for music or podcasts and built-in sounds such as rain, birds, waves, a stream, and a campfire. This lets you use a phone when you want your own audio, or choose a simple background sound without searching for one.
Choose silence if sound makes it harder to relax
Audio is optional. If music, talking, or white noise feels annoying, turn it off. A quiet session is still a complete session.