The PT908 is a low-cost overall vibration meter. This Vibration Meter will measure acceleration, velocity and displacement in peak or RMS (english units). The User does not need any vibration analysis training to use this vibration meter. This Vibration Meter is ideal as a part of a condition-based maintenance program where you don't want to carry an expensive FFT analyzer to collect routine overall vibration data. And it's low-cost provides a quick return-on-investment. Industry's longest limited warranty- 5 years!