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 ? 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; 2 5oz bottles and lids; 1 bottle stand; 1 shoulder/neck strap; 1 AC adapter; 1 drawstring bag (description exceeds maximum possible length)