The ADXL335 is a triple axis mems accelerometer with extremely low noise and power consumption - only 320uA! The sensor has a full sensing range of +/-3g. It can measure the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration.
There is an on-board 3.3V voltage regulator to power the ADXL335 so power provided should be between 3.3V and  6V DC.
 
Operating Voltage 1.8V – 3.6V
Operating Current 350μA (typical)
Sensing Range±3g (Full Scale)
Temperature Range−40 to +85°C
Sensing axis  3 axis
Sensitivity 270 to 330mV/g (Ratiometric)
Shock Resistance Up to 10,000g
Dimension 4mm x 4mm x 1.45mm
 
At the heart of the module is a small, low power triple axis MEMS accelerometer from Analog Devices with extremely low noise – ADXL335. The sensor has a full sensing range of ±3 g. It can measure the static acceleration due to gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration.
The sensor works on power between 1.8V to 3.6VDC (3.3V optimal), and typically consumes just 350µA of current. However, an on-board 3.3V regulator makes it a perfect choice for interfacing with 5V microcontrollers such as the Arduino.
This breadboard friendly board breaks out every pin of the ADXL335 to a 6-pin, 0.1″ pitch header. This includes 3 analog outputs for X, Y and Z axis measurements, 2 supply pins and a self-test pin which allows you to check the functioning of the sensor in the final application.
The analog outputs are Ratiometric, meaning 0g measurement output is nominally equal to half of the 3.3V supply voltage (1.65V), -3g is at 0v and 3g is at 3.3V with full scaling in between.