# Spectra S1 Plus Single / Double Electric Breast Pump Hospital-strength performance with quiet comfort and true on-the-go freedom. The rechargeable S1 Plus gives you powerful, customizable pumping untethered from the wall. * FSA Approved * Closed System * Rechargeable Battery * BPA-Free * Single & Double Pumping ## Key Features ### Rechargeable & Portable Pump where you are with a long-lasting built-in battery and a lightweight body that travels easily. No outlet required. ### Quiet & Comfortable Gentle suction with massage and expression modes, a low-noise motor, and a soft night light for late-night sessions. ### Hospital-Grade Suction Powerful 270 mmHg suction strength to support establishing and maintaining your milk supply effectively. ### Closed System Hygiene Backflow protection keeps tubing and motor dry for cleaner operation, easier cleaning, and safer milk collection. ### Single or Double Pump one side or both on demand to fit your routine and time windows. Flexibility when you need it most. ### LCD Timer & Controls Intuitive LCD display with built-in timer to personalize vacuum and cycle settings and track session length. Video: [Features & Assembly](https://www.youtube.com/embed/ZHqavfsk63U) ## Designed for Comfort Start in Massage Mode to encourage letdown, then switch to Expression Mode to optimize milk flow. Adjust vacuum and cycle speed to find a setting that feels gentle and effective. * Massage mode simulates natural suckling rhythm * Built-in night light for low-light pumping * Quiet motor keeps sessions discreet * Adjustable vacuum and cycle speed ## Take It Anywhere The built-in rechargeable battery means you're never tethered to an outlet. The compact, lightweight design with integrated carry handle makes it easy to pump at home, at work, or on the go. * Long-lasting rechargeable battery * Ergonomic carry handle * AC adapter included for plug-in use * Compact, lightweight design Rated 4.6 Stars by Over 6,400 Parents. The Spectra S1 Plus is a Best of Baby Award winner loved by thousands of moms for its hospital-strength suction and whisper-quiet operation. ## Frequently Asked Questions ### What's the difference between massage mode and expression mode? Massage mode uses a faster, lighter cycle that mimics the initial suckling rhythm to stimulate letdown. Once milk begins to flow, switch to expression mode for slower, deeper suction that maximizes milk output. You can adjust vacuum strength and cycle speed independently in each mode. ### How long does the rechargeable battery last? Battery life varies based on suction settings, but a fully charged S1 Plus typically supports multiple pumping sessions before needing to recharge. The included AC adapter lets you pump plugged in while the battery charges, so you're never without power. ### What flange sizes are included? The S1 Plus comes with 24mm and 28mm flanges. Correct flange fit is essential for comfort and efficient expression. If neither size feels right, Spectra offers additional sizes separately. A lactation consultant can help determine your ideal flange size. ### What does "closed system" mean? A closed system uses a backflow protector that creates a barrier between the expressed milk and the pump's tubing and motor. This prevents milk and moisture from entering the tubing, making the pump more hygienic and easier to clean. It also means the pump can potentially be shared between users with new accessory kits. ### What's included in the box? * Spectra S1 Plus electric breast pump (rechargeable) * Backflow protectors * Duckbill valves and silicone membranes * Tubing * Wide-neck bottles with caps, nipples, discs, and lids * Two flange sizes (24mm and 28mm) * AC power adapter * User guide Note: Included parts may vary by kit. Check the "Included" section above the Add to Cart button for the exact configuration. ### Is this pump FSA/HSA eligible? Yes. The Spectra S1 Plus is FSA approved, which means you can use your Flexible Spending Account or Health Savings Account funds to purchase it. Check with your provider for specific reimbursement details. ### Tips for getting the most out of your S1 Plus * Choose the correct flange size for comfort and efficient expression. Reference the sizing guide or contact support for help. * Start sessions on a gentle setting, then increase gradually to a comfortable level. * Keep spare valves and membranes on hand. Replacing wear parts regularly helps maintain performance. * Use the built-in timer to track session length and maintain a consistent routine. Product information on this page is provided for educational and merchandising purposes only and is not a substitute for professional medical advice. Consult a healthcare professional with questions about your breastfeeding plan.