It's the Enhancement V2 Pro Mini! It's thin (0.8mm)!This Mini board with a adjustable voltage regulator(you can setting the output voltage by yourself)
running the 16MHz bootloader . This Pro Mini V2 does not come with connectors populated so that you can solder in any connector or wire with any
orientation you need.
The Enhancement V2 Pro Mini ,we used all SMD components, made it two layer, etc. This board connects directly to the FTDI Basic Breakout board
and supports auto-reset. The Enhancement V2 Pro Mini also works with the FTDI cable but the FTDI cable does not bring out the DTR pin so the
auto-reset feature will not work.
ATmega328 running at 16MHz with adjustable voltage regulator(3.3V/5V)
USB connection off board
Max 150mA output
Over current protected
Reverse polarity protected
DC input 5V up to 12V
On board Power and Status LEDs
Weight: Less than 2 grams
Size:Approx. 0.7x1.3" (18x33mm)
Package Including: 1x MEGA328P Arduino pro mini