hard-wired transponder

I would like to install a hard-wired transponder for TT use. What brand/model is appropriate for Zone 8? Will this also work with most other clubs?
Porsche Club of America - San Diego Region Discussion Forum
http://forum.pcasdr.org/
Jad wrote:It is an AMB system and most clubs use the same system.
Jad wrote:I do not think it is compatible with baby seats, most drivers with a baby seat seem to get very few good laps regardless of brand of transponder