Dear Customer, Sorry that we don't have P1M, we have K1M instead. K1M is quieter. But S1 pump has more power. S1 Pump Spec. Rated voltage:12V DC Power consumption:17W Maximum flow:960L/h Noise:40~45dBA Maximum system temperature:60℃ PWM:Yes Electric Connector:Molex 4 Pin Warranty:2 years