Medela, Swing, Single Electric Breast Pump, Compact and Lightweight Motor, 2-Phase Expression Technology, Convenient AC Adaptor or Battery Power, Single Pumping Kit, Easy to Use Vacuum Control Plastic Made in USA COMPACT & LIGHTWEIGHT MOTOR: This single breast pump includes a compact and lightweight motor that fits easily into your purse, backpack, or tote bag. It’s easy to bring with you anywhere and anytime RESEARCH-BASED TECHNOLOGY: Unique to Medela breast pumps, this research-based and patented design allows mothers to pump more milk in less time. It resembles a baby’s natural nursing rhythm for improved comfort and efficiency. EASY-TO-USE CONTROLS: A single pumping kit with 24mm PersonalFit breast shields has been added for comfortable, efficient pumping, while easy-to-use vacuum controls let you choose the most comfortable setting. MULTIPLE POWER SUPPLY OPTIONS: Designed for flexibility, the Medela Swing offers a convenient AC power adapter or can be powered by batteries (4 AA batteries not included) for remote pumping on the go. US VERSION does not include the Calma Nipple set. Included is: 1 motor unit; 24mm breast shield; 1 connector (pump body); 1 valve; 2 membranes; 1 tubing; 1 bottle stand; 1 shoulder/neck strap; 1 AC adapter; 1 drawstring bag