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Lucid,
I don't have any insight on these devices but while buying my helmet yesterday I did see various devices displayed.
give the guys @ Stable Energies a call 973-773-3177 they took care of me very well & seemed very knowledgeable and to my understanding the Dad (forgot his name/family owned and run) might be an instructor for NASA....maybe they could answer some of your questions HTH
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'08 E92 M3 6MT | IB | FR | RAC RG63's | VRS Ti Exhaust | Fabspeed HFC & Xpipe
'09 X5 35d SG/SB
'11 X3 28i AW/CN/FW (wife's car |