Features: Two modes can be selected: PWM mode with continuous frequency and adjustable duty cycle; PULSE mode with adjustable positive and negative pulse width, power-on delay start time, and switching times. Multiple application scenarios: suitable for LED brightness adjustment, motor speed control, solenoid valve operation, and more. Digital display: equipped with an LED display showing frequency and duty cycle values for clear and instant readings. User-friendly operation: start-stop button for easy control; wide voltage input range from 3.3V to 30V; 5.08mm terminal connections. Wide range of applications: PWM signal generator ideal for servo motors, stepper motors, electric grippers, and PLC pulse replacement. Specification: Product Name: Signal Generator Color: as shown in picture Material: ABS Working Voltage: 3.3–30V Frequency Range: 1Hz to 150kHz (±2%), recommended 20kHz for motor speed control Duty Cycle Range: 0–100% in 1% increments Pulse Count: 1–9999 or infinite (display shows "represents infinite") Time Range: 0.000s–9999s, 1ms resolution Positive and Negative Pulse Width: 0.000s–9999s Output Load Capacity: less than 8A (MOS switching tubes) Output Amplitude: equal to supply voltage (OUT+ internally connected to V+) Product Dimensions: 79mm x 43mm x 30mm (3.1in x 1.6in x 1.1in) Product Weight: 42g Package Included: 1 x Signal Generator