ITEM NAME:9-50V DC Motor Speed Control PWM HHO RC Controller 2000W 40A 12V 24V 48V UHB Descriptio n Specifications: (1) Working Voltage: DC 10V-DC 50V Wide Operating Voltage Range (2) Control Power: 0.01-2000W (Maximum Rated Current 40A) Different Working Voltages Correspond To Different Control Powers As Follows; When The Working Voltage Is 12V, 12V*40A = 480W Operating Voltage 24V 24V*40A =960W Working Voltage 36V 36V*40A =1440W 40V*40A = 1600W When Operating At 40V Operating Voltage 50V 50V*40A =2000W (3) Quiescent Current: 0.025A (The Quiescent Current Will Not Exceed 25ma When The Operating Voltage Is Between DC 10V And DC50V) (4) PWM Duty Cycle: 5%-100% (5) PWM Frequency: 12KHz (6) Working Temperature: -20 -- 40 (The Ambient Temperature Is Minus 20 Degrees To 40 Degrees Above Zero) The Governor Is Of Industrial Quality And Can Work Stably In The Environment Below Zero. The General Commercial Grade Quality Governor It Is Not Allowed To Work Stably Below Zero. Board Size: 90mm Length, 51mm Width, And 30mm Height (Excluding The Adjustment Of The Potentiometer) Package Included: 1 *Â DC Motor Speed Controller High quality buy, happy buyï ¼ 2000W 40A 12V 24V 48V MAX 10-50V DC Motor Speed Control PWM HHO RC Controller.(4) PWM Duty Cycle: 5%-100%. (5) PWM Frequency: 12KHz. We'd like to settle any problem in a friendly manner. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.