Features Great Control --- This machine can generate square wave pulse frequency signal, which enables easy control on equipment. Stable Output --- PWM output, the frequency and duty cycle can be set independently. Also supports serial communication. Clear Display --- Digital display ensures clear viewing on the date, making the operation and adjustment more convenient. Broad Utility --- Allows for wide application in experiment, motor driving, MCU, PWM controller and so on, very useful. Simple to Use --- Has locking function, can also automatically save all the data after setting, and many other functions. Specification: Item Type: Frequency Generator Material: ABS, PCB Working Voltage: DC 3.6V-36V, input anti reverse connection protection. Maximum Current: 20mA 36V Working Frequency: 1Hz~150KHz adjustable. Duty Cycle: 0-100%, 0.1% adjustable within 15KHz. 1% adjustable above 15KHz Display: 5 digit high brightness digital tube display. Communication: Supports serial communication, which requires serial board, provides serial communication protocol.  Package List:1 x Frequency Generator4 x Screw Package List 1 x Frequency Generator 4 x Screw