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This is a mini vibration motion detector module with delay timing function. When the module detect the vibration, it will output high level and then reach the delay time(0.02s-40s adjustable) it will output low level. DC 5-12V working volage and 200mA driving current output with protecting diode can connect the relay directly ideal for DIY vibration detection projects.Note: 1.When power on the module, it will output low level. 2.The Vi input high level or non-connected, it will work normally, the Vi input low level it will stop work and Vo will output low level.