The base module that the spark fun device uses is only $35.00

http://www.mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMtqO%252bWUGLBzeMW4TCGBne5E

and much lower in quantity. However, its a 3.3v device and requires 
SMD soldering skills. The extra dollars to spark fun are for a 5v 
interface and having already soldered to a board that is easier for 
hobbiests to work with.

However, looking at the bottom picture of the device, I'm not sure 
its all that much lower in profile. There are jumpers and connector 
on the bottom of the board. The spark fun module is smooth on the 
bottom, no components.

>Just added to ScanTool.net store:
>
>http://www.scantool.net/stm4100-low-profile-bluetooth-to-uart-module.html
>
>$20 less than Sparkfun's module, AND low profile. :)
>
>http://www.sparkfun.com/commerce/product_info.php?products_id=8550
>
>Vitaliy
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