This new version adds 2 standoff holes as well as an extra decoupling capacitor. The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to +-16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface. Project description, more information and ordering can be found at https://www.sparkfun.com/products/9836 Datasheet: http://www.sparkfun.com/datasheets/Sensors/Accelerometer/ADXL345.pdf Quickstart Guide: http://www.sparkfun.com/tutorials/240 Example Code: http://www.sparkfun.com/datasheets/Sensors/Accelerometer/ADXL345-talktest.zip Bildr Tutorial: http://bildr.org/2011/03/adxl345-arduino/