The invention consist of a microcontroller operated electronic Backup Alarm Device for use in vehicles, especially in trucks, buses, heavy vehicles, earthmovers, mini trucks, and material handling moveable vehicles. The inventive feature is the use of a electronically powered programmed microcontroller and a speaker driver circuit, current sensing circuit and an amplifier, on a Printed Circuit Board (PCB) Assembly suitably connected to a speaker, where the speaker has a dual function of acting both as a mike and as a speaker.
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