* 2 Modes & 9 Levels. The sucking mode mimics a baby's sucking to stimulate milk production. The massage mode massages first and then sucks to alleviate the problem of breast milk blockage. The maximum suction can reach 275mmHg, which is suitable for most mothers. * Low Noise & Leak-Proof. The noise of the portable breast pump is less than 40 decibels, so you don't have to worry about waking up your sleeping baby or attracting the attention of others during use. The breast pumps are counter-flow and leak-proof, so if the breast pump leaks, please check whether it is installed correctly. * LCD Display. The display will show the pump mode, level, usage time and remaining power, so you can easily see the usage. In order to avoid overuse, this hands-free breast pump is set with a 30-minute auto-off function. * Safe Material & Easy to Clean. The breast pump uses food-grade silicone, free of EPA. The breast pump accessories are detachable for more thorough cleaning. Improper installation will cause the suction of the breast pump to be reduced. If your breast pump has low suction, please check if it is installed correctly.