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Check the listing for details. High Power Frequency Duty Cycle Adjustable Driver for LED Motor Solenoid Valve. Condition: New. Listed at 19.18 USD. Can directly drive loads such as LEDs, motors, solenoid valves. Positive and negative pulse width length: 0.000s-9999s, the minimum can be set to 1ms. Frequency range: 1Hz~150KHz, accuracy is about 2%.