Features Specification: Item Type:Motor Control Operating voltage: DC5V~30V, input reverse polarity protection. Rated Current: 5A, Maximum Current 15A Maximum power: 150 W. Operating frequency: 1 kHz to 99 kHz adjustable, 1 kHz levels, standard frequency 20 kHz, accuracy approx. 1%. Working cycle: 0-100%, 1% step Product size: 79 x 43 x 26 mm/3.11 x 1.69 x 1.02 inches. All adjustable parameters are switched off. Package list: 1 x module. Note: Operation of the digital encoder buttonIn the standard interface: (standard display duty cycle)Short press - switch engine start and stopLong press - call setting interfaceTurn counterclockwise - duty cycle reductionTurn clockwise - Increase duty cycle Under the settings screen: short press - select set parameters and switch between lower limit of the work cycle, upper limit of the work cycle and work. The lower limit of the working cycle is displayed as "L" + two digits. The upper limit of the working cycle is displayed as "H" + two digits or "100". The display frequency of the working frequency is "F" + two digits. Long press - leave setting interface. Counter-clockwise rotation - decreases the appropriate settings. Turn clockwise - increase the parameter accordingly. Post Stop connection The open key or the 3.3V level can be connected externally. When the key is closed or the 3.3V level is lowered, the start/stop state of the engine is switched. Package List 1 x Module