Kinyo Wise-Calm is a highly efficient and silintious electric tyrant perfect for moms who want to extract their milk comfortably, it also offers an alternative to breastfeeding when health problems, such as breast gum or sore nipples, make breastfeeding difficult. Wise-Calm is easy to operate even with one hand and you can choose the most comfortable suction level by operating only one command. It can be used either by connecting it to the current, or by the batteries (included). The tire is composed of only five parts, that is why the assembly and cleaning takes a few minutes. Technical specifications: Brand: Kinyo Model: Wise-Calm Material: Polypropylene (PP), silicon, ABS Color: Yellow Main pump size: 13*11*5 cm Milk bottle size: diameter 6 cm * height 10 cm * Capacity 140 ml (5.0 ounces) funnel size: 8.5 cm Pipe length: about 75 cm Power supply: 4* AA batteries or Adapter (included) Adapter specifications: Adapter EU input power: AC100 ~ 240V, 50 / 60Hz, 0.3A Output power: DC 6V 1A 12W Suction power: 130~320mmHg, 17~42Kpa, Level 9 Adjustment buttons: On/ Off/ Pause, Mode Conversion, Control Level of Suction (plus or minus)