You need a steady 12V DC power source. A portable jump-starter battery or a dedicated AC-to-DC power brick works best. Wiring the ISO Connector: Yellow Wire: Constant 12V (Memory). Red Wire: Ignition/Switched 12V (Power). Black Wire: Ground.
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Unlike modern digital radios, the 815 uses a ferrite rod antenna for AM bands and a telescopic whip for FM/SW. The manual teaches you the "rotational orientation" for AM—simply turning the radio 90 degrees can double your channel reception. blaupunkt gmbh 815 manual portable
If your unit is not working correctly, consult the troubleshooting section of the Blaupunkt GmbH 815 manual: You need a steady 12V DC power source
: For units with USB or SD slots, insert the device to automatically begin playback of MP3 files. Maintenance Tips I can: Unlike modern digital radios