Features: This PWM Signal Generator Module offers adjustable frequency from 1Hz to 150kHz and duty cycle control, featuring a real time LCD display for precise waveform customization. With 3.3V-30V input, it delivers stable square/rectangular waveform outputs for demanding electronic applications. Suitable for engineers, educators, and DIY enthusiasts working on motor control, LED dimming projects, or circuit prototyping. Suitable for lab experiments, industrial automation setups, or robotics development with its portable design visualization. Achieve professional grade signal accuracy across variable loads through button controls and rugged construction certified for repeated use. Specifications: Size:Approx.52x32mm Working : 3.3V~30V Frequency: 1Hz~150Khz Package Includes: 1 Set Signal Generator note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.