There are a few potential downsides to using a Bluetooth speaker:

1. Limited range: Bluetooth speakers typically have a range of about 30 feet, so you may experience interference or loss of signal if you are too far away from the speaker.
2. Battery life: Most Bluetooth speakers rely on batteries, which can run out of power if you use the speaker for an extended period of time. This can be a problem if you are using the speaker at an outdoor event or in a location where it is not possible to plug in.
3. Sound quality: While Bluetooth speakers have improved significantly in recent years, they may not offer the same level of sound quality as a wired speaker. This can be particularly noticeable at high volumes or when listening to music with complex audio.
4. Interference: Bluetooth speakers can potentially interfere with other devices that use the 2.4 GHz frequency band, such as wireless routers, keyboards, and mice.
5. Security: Bluetooth connections are generally secure, but there is a small risk of “man-in-the-middle” attacks, in which a hacker could potentially intercept the signal between the speaker and the device it is paired with.