Three-channel PWM output with wide frequency range and independently adjustable duty ratio Frequency range divided into four ranges with automatic switching: 1. XXX (no decimal): 1Hz step, range 1Hz to 999Hz 2. X.XX (decimal in units place): 0.01kHz step, range 1.00kHz to 9.99kHz 3. X.XX (decimal in tens place): 0.1kHz step, range 10.0kHz to 99.9kHz 4. X.X.X (decimal in units place): 1kHz step, range 1kHz to 150kHz Example: frequency display 100 = 100Hz pulse; 1.01 = 1.01kHz pulse; 54.1 = 54.1kHz pulse; 1.2.4 = 124Hz pulse Duty ratio range: 0% to 100%, with 100% displayed as A0% All settings are automatically saved and retained during power loss Features 8 keys for frequency and duty ratio adjustment, supporting short press (increment/decrement by one step) and long press (fast increment/decrement), with automatic save function Three independent duty ratio buttons allow simultaneous pressing for real-time adjustment; LCD displays the duty ratio of the last pressed button, enabling real-time multi-channel duty ratio scanning Applications: 1. Square wave signal generator for experimental development 2. Generate square wave signals to control motor drivers 3. Generate adjustable pulses for microcontroller (MCU) applications 4. Generate adjustable pulses for controlling circuits such as PWM dimming and speed control Color: As shown in photo Material: PCB and electronic components Package Contents: 2 x 3-Channel PWM Pulse Generator Module Note: Light reflection and screen differences may cause slight color variation between image and actual item. Measurement error allowed within +/- 1-3cm