What is the use of the two-wire small speaker of an electric vehicle?

The small speaker is an alarm and cannot be removed. The electric vehicle controller is a vehicle core controller. The electric vehicle controller has reverse charging, stall protection, dynamic and static phase loss protection,... That small speaker is an alarm and cannot be removed. The electric vehicle controller is a vehicle core controller. The electric vehicle controller has reverse charging, stall protection, dynamic and static phase loss protection,... That small speaker is an alarm and cannot be removed. The electric vehicle controller is a vehicle core controller. The electric vehicle controller has reverse charging, stall protection, and dynamic and static phase loss protection.