Module features: 1. Dual mode operation with a 0.1% duty cycle in good model; Lock function to prevent incorrect operation; 2. Frequency and duty cycle display on a clear LCD screen; Adjusted using an encoder potentiometer for easy operation; PWM output frequency and duty cycle can be set independently; 3. Module description: PWM output with independent control of frequency and duty ratio; 4. Upper and lower limits of duty cycle can be set; KPWM switch allows PWM output to be turned on and off with a single key; 5. Wide frequency range with high precision; Supports serial communication; Model: XY-KPWM Normal mode: Frequency range 1 Hz to 150 KHz, duty cycle range 1% to 99.9% Good mode: Frequency range 1 Hz to 15 KHz, duty cycle range 0.0% to 0.1% Frequency ranges are divided into four bands with automatic switching: 1. XXX (no decimal point): Minimum unit 1 Hz, value range 1 Hz to 999 Hz. 2. X.XX (decimal point in tenths): Minimum unit 0.01 KHz, value range 1.00 KHz to 9.99 KHz. 3. XX.X (decimal point in tenths, tens place): Minimum unit 0.1 KHz, value range 10.0 KHz to 99.9 KHz. 4. XXX (decimal point in tens and hundreds): Minimum unit 1 KHz, value range 100 KHz to 150 KHz. Example: Frequency display "100" indicates a PWM output of 100 Hz pulse; "54.1" indicates 54.1 KHz PWM output pulse; "124" indicates 124 KHz PWM output pulse. All parameters are saved when powered off. Specifications: Working voltage: 3.3 V to 30 V Frequency range: 1 Hz to 150 KHz (normal mode); 1 Hz to 15 KHz (good mode) Frequency accuracy: Approximately ±2% within each range Load capacity: Output current approximately 5 mA to 30 mA Output amplitude: PWM amplitude equals supply voltage Operating temperature: -20°C to +70°C Material: Plastic Color: Grey black Package Contents: 1 x Signal Generator Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is ±1-3 cm.