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 for gravity and finally achieves the effect of. USAGE:is convenient, for 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 Specifications: Supply Current:less than 100mA Material:PC Size: 40x50x28cm / 15.75x19.69x11.02inch 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! Package included: 1x for Micro USB 5V Powered Module DIY Kit