- Product Description SOBO AC Amphibious SA-3000 Water Pump features: LOW WATTAGE HIGH OUTPUT PUMP (Return of Investment in terms of saving on Electricity bills). High performance motor with innovative electronics, and Energy Saving up to 65%) Pump Damage Protection system (Waterless Protection) The real sine wave frequency conversion control technology adopts the most advanced 6T sensor less three-phase intelligent drive, through adjusting the duty cycle (PWM) to change the speed and power of the water pump, soft start, safe and reliable. Long life; low noise; high efficiency.