Features: Records 3-axis shock Build-in accelerometers Measures dynamic and static acceleration Real-time operation Freefall detection mode User settable trigger levels Real-time FFT Specifications: Model: DT-173A Acceleration Sensor: MEMS Semiconductor Acceleration Sensor sampling Rate: 256Hz Acceleration Range: +/- 18g Acceleration Resolution: 0.00625g Acceleration Accuracy: +/- 0.5g Non-Linearity: +/- 1% Bandwidth: Approx.0 to 60Hz Trigger Range: 0 to 18g(XYZ magnitude) Sampling Rate: 1sec. to 24hours Memory: 8Mbit FLASH(Memory for 504126 samples, about 168042 samples/.axis for x, y and z axis separately) Package includes: 1 * Multimeter 1 * 3.7V Li battery 1 * Software 1 * Clamshell