1. Constant power, the voltage is 9 v - 16 v change, pump power constant; 2. Overtemperature protection: when the environment temperature over 100 ℃ (limit temperature), water pump stop, in order to guarantee the life of the pump, suggest installation position in low temperature or air flow better; 3. Overload protection: when the pipeline has impurities, cause the pump current increases suddenly, the pump stop running; 4. Soft start; 5. PWM signal control functions. Welcome to visit our official website : http://www.bldcelectricmotor.com