The factors that affect Bluetooth signals mainly include the following aspects:

Distance factor: The effective working range of Bluetooth devices is usually within 10 meters. If the distance between devices exceeds this range, the signal will weaken, leading to unstable or even disconnected connections.

Obstacles: Walls, metal objects, and other physical obstacles can significantly reduce the strength of Bluetooth signals. These obstacles will block the transmission of signals, resulting in signal attenuation.

Signal interference: Bluetooth devices operate in the 2.4GHz frequency band, which is also used by devices such as Wi Fi, microwave ovens, and wireless phones. Therefore, interference from other wireless signals can affect the stability of Bluetooth signals.

Device compatibility: Different Bluetooth versions and protocols of devices may have compatibility issues. If the version or protocol between the device and the paired device is incompatible, the Bluetooth connection may be unstable.

Device status: Low battery level, outdated software or firmware versions, Bluetooth module failures, and other issues with Bluetooth devices may also cause unstable connections. Ensuring that device software and firmware are up-to-date and updated in a timely manner can reduce these issues.

Surrounding environment: Metal parts inside the car, window film, etc. may block and interfere with Bluetooth signals. Reducing or adjusting these obstacles can improve signal quality.

The methods to improve Bluetooth signal strength include:

Shorten distance: Try to bring Bluetooth devices as close as possible to enhance signal strength.
Reduce obstacles: Avoid or adjust the position of physical obstacles to reduce signal obstruction.
Update software and firmware: Ensure that all devices have the latest versions of software and firmware to improve compatibility and stability.
Eliminate sources of interference: Turn off or stay away from other wireless devices that may cause interference.
Check device status: Ensure that the Bluetooth device's battery is fully charged and promptly repair or replace faulty Bluetooth modules.