The output of the speed controller is DC, compatible with governors. The operating voltage range is 9-50V. Features an imported special speed drive IC. Designed with a thickened copper sheet and balanced PCB layout for heavy current handling, ensuring high-efficiency PWM output. Features: - New generation 9-50V 40A DC motor pump speed controller - Enables control and adjustment of DC motor speed - Lightweight design with high current capacity and wide voltage range - High reliability, efficiency, and torque with low heat generation - Enhanced with thickened copper sheet and balanced PCB layout for heavy current performance Specifications: - Operating voltage: DC 10V–50V - Controlled power: 0.01–2000W - Quiescent current: 0.025A - PWM duty cycle: 5%–100% - PWM frequency: 12kHz - Working temperature: -20°C to 40°C - Material: Metal and plastic - Item size: 12.2 x 5.5 x 3.8cm (4.8 x 2.17 x 1.5in) L x W x H - Item weight: Approximately 137g (4.83oz) - Package size: 20 x 14.7 x 4cm (7.87 x 5.79 x 1.57in) L x W x H - Package weight: 138g (4.87oz) Package List: 1 x PWM DC motor speed regulator controller switch Note: User manual is not included in the package.