1. The module features dual mode with a duty cycle of 0.1% in good mode and a lock function to prevent wrong operation. 2. The frequency and duty cycle are displayed clearly on the LCD, adjusted via an encoder potentiometer for convenience, and can be set separately for PWM output. 3. The module supports PWM output with independently settable frequency and duty ratio. 4. The duty cycle has configurable upper and lower limits, with a KPWM switch for one-key on/off of PWM output. 5. It has a wide frequency range, high precision, and supports serial communication. 6. Model: XY-KPWM 7. Normal mode: Frequency range 1 Hz ~ 150 KHz, duty cycle 1%. 8. Good mode: Duty cycle range 00.0 ~ 0.1%, frequency range 1 Hz to 15 KHz, divided into four frequency ranges with automatic switching: a. XXX (no decimal point): Small unit 1 Hz, value range 1 Hz ~ 999 Hz. b. X. (decimal point): Small unit 0.01 KHz, value range 1.00 KHz to 9.99 KHz. c. .Decimal point X (10): Small unit 0.1 KHz, value range 10.0 KHz to 99.9 KHz. d. 7.0.x.x.X (decimal point in dozens, hundreds): Small unit 1 KHz, value range 1 KHz to 150 KHz. 9. Frequency display examples: 100 means 100 Hz PWM output pulse; 54.1 means 54.1 KHz PWM output pulse; 1 means 124 KHz PWM output pulse. 10. All set parameters are saved when turned off. 11. Parameters: a. Working voltage: 3.3 ~ 30 V. b. Frequency range: 1 Hz ~ 150 KHz (normal mode); 1 Hz to 15 KHz (good mode). c. Frequency accuracy: About 2% in each range. d. Load capacity: Signal output current about 5 ~ 30 mA. e. Output amplitude: Equal to the power supply voltage. f. Environment temperature: -20 ~ +70 . g. Material: Plastic. h. Colour: Grey black. 12. Package Contents: 1 x Signal Generator (only the above package content, other products not included).