Pulsation Massaging Milking: The pulsation system imitates the frequency of lambs or calves milking, pulsating 45-47 times per minute, adjustable suction cow milker providing strong suction while not harming the animals. Our milking machine for cows and goats equipped with pulsation frequencies suitable for various animals, with no need to reset, providing a comfortable milking experience for your cows or goats. A good battery powered milking machine for cows. Battery Powered: The rechargeable cow milking machine comes with battery and a plug-in port. The plug-in port and charging port are separate, and the actual power can be achieved with the plug-in use. With a powerful rechargeable electric pump, the maximum power can reach 48 watts, making milking more efficient and saving your time.