20A 12V24V36V48V DC Motor Speed Controller High Power Drive Module PWM Controller 1. Control frequency: 25KHZ 2. Limit power: 1200W 3. Input voltage: DC10-60V 4. Output voltage: linear under load 5. Speed regulation type: current regulation 6. Speed regulation mode: potentiometer (linear) 7. Wiring type: fence type terminals 8. Output limit current: 20A (long time use 10A, 450W or less, pay attention to keep the module smooth heat dissipation conditions) 9. Make sure the positive and negative connections are correct before powering on, and do not contact the heat sink, as it may burn the circuit board 10. Note that this is not a power module, must be connected to the motor in order to adjust the speed, not connected to the motor multimeter output did not change 11. Weight: about 76.4 g 12. Size: module about 7.7 x 4.5 x 2.8 cm, motherboard mounting size about 7.3 x 4 cm, potentiometer mounting holes about 0.7 cm, knob wire length about 20 cm Please note: 1. This speed controller is intended for use with brush DC motors 2. It is not suitable for DC brushless motors; nor can it be used as a voltage regulator or voltage stabilizer