This testing machine is used to test product fragility and quality control for small products, especially electronics & electronic parts, micro-electronics devices, etc. Feature 1.It can generates half sine waves, and suitable to many standard testing waveform with high acceleration range of 50 - 50, 000 ms2.2. It has double layer of shock absorber, which reduces the shock during the testing, and it does not need a large space for installation.3. Variety of holder for fixing the objects enables to test three directional shock, and it helps to improve the operating efficiency when you have a large number of specimens.4. High reproducibility.5.Anti rebound mechanism.