PARAMETER --- working voltage DC 3.3-30V; frequency range 1Hz-150kHz; duty ratio range 0-100%; number of pulse 1-9999 or infinite; delay output time 0.000s-9999s. MODE --- the signal generator has 2 modes, PWM mode (default) & pulse mode.APPLICATION --- the signal generator module can be used to generate wave rectangular wave signals for controlling DC motors or stepper motor driver; for servo motors, stepper motors, electric jaws, PLC pulses replacement, etc.PROTECTION --- with anti-reverse protection, 5.08mm terminal wiring.EASY TO OPERATE --- the signal generator can control or , it can also connect the external switch to control the output signal ON/OFF.Parameter:Working Voltage: DC 3.3-30V, with anti-reverse protection.Frequency range: 1Hz~150KHz, accuracy about 1%.Duty cycle range: 0-100%, 1% stepping.Number of pulses: 1-9999, or infinite (display '----'stands for ).Delay output time: 0.000s-9999s, the minimum can be set 1ms.positive and negative pulse width length: 0.000s-9999s, the minimum can be set 1ms.signal loading capacity:less than 30mA.Output signal amplitude: amplitude is equal to the supply voltage. Modes:PWM mode - frequency (continuous), duty cycle. Note the number of pulses cannot be set in this mode, and the pulse is always sent;PULSE mode - positive pulse width time, negative pulse width time, delay time, and number of pulses are adjustable.Colour: Material:plasticSize:71*43mmPackage contents:1*PWM Pulse GeneratorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.