With a double breast pump, you can pump both breasts at the same time. This way, you can pump faster and more efficiently than with a single pump. That's useful, because you can really use that extra time with a baby at home. There are special bras for a breast pump with a double breast shield. This way, you have your hands free when you pump. It depends on the power supply which double breast pump suits you best. Choose a double pump with a rechargeable battery if you use it multiple times per day. Do you only use only use your pump a single time per day? A pump with regular batteries is sufficient.