Compatibility: Only compatible with eufy Breast Pump S1 / S1 Pro. Charge Two at Once: Charge two breast pumps simultaneously with this magnetic charging cable. Enjoy the streamlined process without having to look for multiple charging ports. Hassle-Free Magnetic Charging: Ensures a hands-free, tangle-free, quick, and easy recharge. Ideal for Work and Travel: Easily fits into your briefcase, purse, backpack, or suitcase, making it perfect for the office or trips out of town. Guaranteed Reliability: eufy breast pump accessories are covered by a 90-day limited manufacturer's warranty. 1-Year Lifespan: Durable for one-year use.