Product details of Rechargeable Breast Pump Anti-Back Low Noise Painless And Massage Pump Rated Voltage: 5V Rated Power: 3W Material: PP + Silicone Function Modes: Massage & Suction Bottle Capacity: 180ML Strength: 60mmhg-280mmhg Safe & Hygiene: Made of food grade PP and silicone, no harmful substances. Each part can be flexibly disassembled and washed, except for the electrical parts.