The eufy Wearable Breast Pump S1 Pro is a hands-free, portable breast pump designed for discreet and convenient milk expression. It features a 24mm heating flange for enhanced comfort and milk flow. The pump includes a rechargeable casing for on-the-go use and offers adjustable suction levels. It also comes with inserts in 17mm, 19mm, and 21mm sizes to ensure a proper fit for different nipple sizes. The wearable design allows for multitasking while pumping.