Variable Frequency / Pulse Width Generator ModuleProduct Details:Operating Voltage Range: 3.3 ~ 30 Volt DCAuto Save Prevents Setting Loss Due to Power FailureSimple Source of Test PulsesModule Has Backlit LCD Display (Blue with White Characters)LCD Display of Frequency and Duty Cycle, Very Clear and Easy to AdjustFour Push Button Switches Used to Set the Frequency and Duty CycleShort Press for Single Unit Increase or DecreaseLong Press for Rapid Increase or DecreaseFrequency Range: 1 Hz ~ 150 KHz; Auto SwitchingConnections: 0.1″ Pitch Solder Pads Duty Cycle ~0 – 99 PercentAccuracy: ~ 2 Percent (Each Range)Max Output Current: <30maOutput Voltage: ~VccDimension: 2.063" (L) x 1.25" (W) x 0.375" (T)UNKHW-753