This digital voltmeter allows battery and alternator monitoring and features a button to turn the display on and off. The voltmeter fits into one of the slots above the radio in the E30 dashboard.
The housing is 3D printed in durable, temperature, and UV resistant ASA plastic and finished to match the color and texture of the OEM plastic.
Also compatible with E28, E24, and E32 BMW models.
Installation is up to the user. The in-car photograph demonstrates the voltmeter attached to the radio power and ground wires.