The Bebebao 5020 is a double electric breast pump designed to help mothers efficiently express breast milk. Being an 'Old Version' likely indicates it may lack some features or improvements found in newer models. It features double pumping capability, allowing for simultaneous expression from both breasts, saving time. It is rechargeable, offering portability and convenience. The pump is electric, providing consistent suction and operation without manual effort. This model likely includes adjustable suction levels to accommodate individual comfort and milk flow. It's designed for mothers seeking a hands-free, convenient, and efficient way to express milk.