Specification: Working Voltage: 3.3~30V (Note: positive and negative poles must not be reversed, otherwise it may burn) Frequency Range: 1Hz~150KHz, accuracy about 2%. Motor speed control usually selects 20KHz. Duty Cycle: 0-100%, 1% step. Number of Pulses: 1-9999, or infinity (displaying \"----\" represents infinity). Delayed Shutdown Time: 0.000s-9999s, the limit can be set to 1ms. Positive and Negative Pulse Width: 0.000s-9999s, the limit can be adjusted down to 1ms. Output Current: Less than 8A (MOS switching tube). Output Amplitude: Amplitude is the same as the supply voltage (OUT+ and V+ module internally directly connected). Product Size: 79*43*30mm Product Weight: 42g Features: 1. Directly drive LEDs, motors, solenoid valves, and other loads. 2. Two modes can be selected. PWM Mode: Frequency (continuous), duty cycle. Note that the number of switching cycles cannot be adjusted in this mode; it switches on and off constantly. PULSE Mode: Positive pulse width time, negative pulse width time, delay start time, adjustable number of switching cycles. 3. With a start-stop button to control start and stop. 4. Wide voltage input 3.3-30V, 5.08mm terminal connection. Package Includes: 1*High-Performance ZK-PP2K PWM & Pulse Generator Frequency Duty Cycle Adjustable Driver