Phase 1: Stimulation - 9 Levels Of Automatic Massage And Stimulation To Prepare Your Breasts For Extraction. Phase 2: Extraction - 9 Levels Of Customisable Extraction With Gentle Suction That Mimics The 2 Natural Sucking Phases Of The Baby: Initially Small, Fast, Shallow Feeds To Stimulate; Then Slow, Deep Feeds To Encourage A Greater Flow Of Milk From The Breast. Phase 3: "Anti-Stasis" Draining Function - Select When You Feel It Is Necessary, To Help Empty Your Breasts. This Helps You To Produce More Milk And Prevent The Risk Of Breast Engorgement And Mastitis. Cup With Soft Silicone Pad With Massaging And Stimulating Petals, Touch Keyboard For Better Product Cleaning, The Compact Size Makes It Also Suitable For Travel. Rechargeable Lithium Battery, Rechargeable Lithium-Ion Battery Provides Up To 4 Full Cycles, Recharges In Just 3 Hours.