Overview 
There are many models of breast pumps which meet different 
needs. After detailed reviews, we found that Spectra  S1/S2 Hospital 
Grade Double/Single Breast Pump is suitable for all mothers who has trouble letting down 
to a pump or a mother who wants to closely match their baby’s suction pattern. The 
pump is designed with closed system. It is powerful, comfortable, portable and 
quiet. Spectra pay attention to details. The S1/S2 breast pump is 
perfectly designed with night light and time. Worth of money. 
Adjustable Suction Cycle (30-46 RPM) and Speed (0~300 mmHg)
If you ask moms what make them hesitate to breastfeed their 
babies. Time, work, husband’s support and even living environment would be the 
issues. However, it is surprising that “Afraid cannot build or get a letdown” is 
one of the main concerns. For those who want to be hard-working or exclusively 
breastfeeding moms, it is nightmare when they are hard to express enough milk 
for their little one. Not all moms are lucky enough to have sufficient milk 
supply. Even though they get milk flow at first, most moms find the milk flow is 
difficult to maintain, especially after 6 months.
Spectra S1/S2 Hospital Grade Breast Pump tries to help 
those moms by great flexibility of suction cycle (how fast the breast pump cycle 
in one minute) and suction pressure (how strong the suction). Because, generally 
speaking, baby suck can stimulate milk flow, the suction cycle of a good breast 
pump should be approximately 40 to 46 cycles each minute, just like a nursing 
baby sucks. Spectra S1/S2 Breast Pump allows 5 levels of suction cycles 
range from 30-46 RPM. It implies moms can tune the cycles as closely as their 
babies’ sucks. It is extremely helpful to draw breast milk.
For the suction pressure, Spectra S1/S2 Hospital Grade Breast Pump has AWESOME maximum 300 mmHg 
divided into 12 levels. It means that you can start with reasonable suck or slow 
suck, and then speed the suck up. Moms find it really help them to get a good 
amount of milk out. Spectra S1 breast pump is standout against other 
models even against the bestselling models of well-known brands.
Adjustable Letdown Mode
One of the standout features of Spectra S1/S2 breast 
pump is the letdown mode. Just turn the massage/letdown button on, the breast 
pump massage the breast and simulate the milk flow. After getting the letdown, 
moms can change from letdown to actual pumping. Different with other breast 
pumps, Spectra Cimilre S1/S2 breast pump does not only has letdown mode, but 
also fully adjustable letdown mode. Moms can adjust the cycle and suction in 
letdown mode. That’s why for those moms who are difficult to get milk flow by 
using other breast pumps can build up supply efficiently and comfortably when 
using Spectra  S1/S2 Hospital Grade Breast Pump .
Ready for Frequently Use
The Spectra S1/S2 breast pump is designed for heavy 
usage like more than eight times per day and classified as hospital grade breast 
pump. The motor has a long motor life with 1500 hours. The Spectra S1/S2 
breast pump can be changed to double pump by removing the rubber cover and plug 
in the second kit. It can meet different needs.
Well-designed Hygienic Closed System
Just like many famous models, Spectra S1/S2 breast pump 
adopts closed system design. Backflow of breast milk to tubing and motor is 100% 
prevented. When diaphragm pump and interact with one another to generate 
inhalation pressure, the backflow preventer blocks inhaled air and milk from 
flowing back to bottle. It implies the pump is much more hygienic and easy to 
maintain. As no milk will flow back, so you just need to clean the funnel but 
NOT inside. Don’t look down on this feature! Imagine how tired you are when 
takes care of your baby! And how annoying it is to clean the parts and tubing 
after EVERY USE! It could be HEAVY duty.
Quieter than a Fan
Most babies are easily awakened. When looking after sleeping 
babies, most moms need to take SPECIAL care. They must keep as quiet as 
possible. Unfortunately, NOISY is one of the common features of 
electric breast pumps. Some moms therefore use manual pump although it is not as 
efficient as electric pump. Spectra S1/S2 Breast Pump breaks the rule. 
Most moms love the SUPER QUIETNESS of Spectra S1/S2 Hospital Grade Breast Pump . It is 45 db only which is quieter 
than a fan, you will wonder whether it is on or not! Moms can use the pump 
without worry to wake the baby.
I have a Spectra S1 and LOVE it. I have a Medela Freestlye - I definitely prefer the Spectra 
over the Medela. If you want more info, go and try it out. 
Hope that helps and good luck!





 
 
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