Features:This product is made of high quality ABS material, strong and durable.The adjustable frequency range is 20HZ-10KHZ, which can be selected according to the need (the frequency is allowed to have 10% deviation). If special frequency is required, the C1 capacitor needs to be replaced.The frequency adjustment is adjusted by the multi-turn potentiometer.Specifications:Material: ABSNo-load current: Approx. 3mAOutput drive current: 200mA MaxApplication: Used as a signal source in the circuitPackage list:1 x Pulse Output Adjustable ModuleNote:Application method:Connect to the power supply to work.When in use, a 0.1uf power supply filter capacitor can be connected to the power supply to stabilize the operation.Adjust the potentiometer clockwise, increase the frequency, adjust the potentiometer counterclockwise, reduce the frequency.