ITEM NAME:SG3525 PWM Controller Module Board Adjustable Frequency 100HZ-100KHZ Descriptio n Description: Description: 1, Onboard SG3525A PWM Control Chip 2, On-Board 78M05 Regulator Chip, Providing A Reliable Reference Voltage 3, Onboard Two Precision Adjustable Resistors, R3 Controls The Duty Cycle, R4 Control Frequency 4, On-Board Power Indicator 5, The Working Voltage: 8 ~ 12V 6. Frequency Range:Â 100HZ-100KHZ Adjustable 7. Duty Cycle: 0 - 100% Adjustable 8. Voltage: 5V Specifications: Specifications: Material: Controller Module Color: Blue Size: 30.8*18mm Package Included: Package Included: 1 *Â SG3525 PWM Controller Module Note: Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. High quality buy, happy buyï ¼ SG3525 PWM Controller Module Board Adjustable Frequency 100HZ-100KHZ.Frequency Range: 100HZ-100KHZ Adjustable. Duty Cycle: 0 - 100% Adjustable. 4, On-Board Power Indicator. We'd like to settle any problem in a friendly manner. We want to make sure you are happy with our item.