A piezo-noise microscope for use in examining a sample of piezoelectric material is provided. This object is achieved by providing a planar structure with 4 bending actuators that can be produced through MEMs based manufacturing. A first arm having a hand attached thereto includes a magnet that when in proximity to one of the sensors triggers said sensor, whereby a user moving the hand with the magnet to a location on the figure containing a sensor, the figure plays pre-recorded sounds indicative of the location. The central processing unit includes a device for controlling or regulating at least one of the peripheral hardware units, or to provide status related information in vocal form as a response to said vocal instructions. The invention not only reduces the overall volume of the power supply and lowers the production cost, but also increases the air intake angle through the guidance of the fillet surface, and allows outside cold air to enter into the casing successfully and increases the airflow entering the casing, so as to enhance the heat dissipating effect. The POS device also includes several interfaces to access the diagnostic application.