Description: PRODUCT: This is a mini device that can suspend foam balls. The device consists of a single chip microcomputer, a driver chip and two probes. PERFECT DESIGN: Small and exquisite appearance. Small size, does not take up space. WORKING PRINCIPLE: standing is that there is a certain distance between the transmitting end and the reflecting end (or another transmitting end) (called the resonant cavity distance), and the transmitted and the reflected (or another acoustic ) are continuously superimposed to form a standing . , the acoustic force on the object at the standing node overcomes the effect of gravity and finally achieves the effect of . USAGE: is convenient, Micro USB 5V . out two buttons, and write the pins and provide the schematic diagram, and enthusiasts can debug the program by themselves to learn. APPLICABLE: Mainly used for students or enthusiasts to learn about standing . Controlling the up and down movement of suspended objects is not currenctly supported. Provide source Specification: Supply Current:<100mA Material: PC Size Chart: 40x50x28cm / 15.75x19.69x11.02inch Package Includes: 1x Micro USB 5V Powered Module DIY Kit Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!