[off-topic] OBDII scanner

[Jim Householder]

Hi,

I've just ordered an OBDII-Bluetooth scanner from www.tmart.com for 
about $12 (marked down from $45???).  It's labelled ELM327 and has a 
blue and orange label.  The object is to use it as input to a decent car 
computer that I want to develop.

Is there a risk that plugging it in will damage my car?  The only 
cautions I've seen so far regarding the various models of scanners is 
that some do not handle all protocols.

Thanks
Jim