Pulsation cycle is about 40~46 times per minute, can saves at least one-half of the labor and time. The milk container is equipped with a check valve that prevents the milk flow into the pump when the milk is full. 13200 mAh Large Capacity Upgraded Rechargeable Battery,it can work fully 3 hours with 5hours charge.Also you can adjust the working frequency of the motor through the knob, to reduce the uncomfortable feeling of cows or goats at high intensity of milk sucking.