ITEM NAME:2000W 40A 48V 24V 12V MAX 10-50V DC Motor Speed Control PWM HHO RC Controller 100% brand new and high quality working voltage:DC10v- DC 50V Rated current:40Aï ¼Ë†Maximum output currentï ¼â€° Control Motor Power:0.01-2000W, working voltage 12V:12V*40A=480W(max) working voltage 24V:24V*40A=960W(max) working voltage 36V:36V*40A=1440W(max) working voltage 50V:50V*40A=2000W(max) quiescent current:0.025A PWM Regulation range:5-100% PWN Frequency:12khz PCB Size:90x51mm(inch:3.5"x2") Case size:105x55x40mm(inch:4"x2.2"x1.6") operating temperature:-20℃~40℃ Quantity:1PC 1 x 12V 24V 48V 2000W MAX 10-50V 40A DC Motor Speed Control PWM HHO RC Controller.PWM Regulation range:5-100%. Also note that monitor settings may vary from computer to computer and may distort actual colors. PWN Frequency:12khz.