I'm willing to put money on next year's headliners being Rammstein, Iron Maiden and AC/DC.
The original Twisted Sister line-up have also regrouped to record a cover of AC/DC 's ' Sin City ' for inclusion on the CD.
The FPM-5740 flow indicator is ac/dc low-voltage powered, and is a low-cost alternative featuring frequency and totalizer outputs.
Check and see what kind of batteries the units use and if AC/DC power adaptors are available for the unit you have in mind.
An AC/DC adaptor will allow passengers, especially kids, to watch TV as you drive.