Product Description:  Notes: 1) It is recommended that you use it with water-based lubricant, instead of silicone-based lubricant, massage oil or hand cream. 2) Stop using it if it is not smooth enough or broken. 3) Do not use boiled water to clean it. 4) Keep it away from children. Feature: [High Quality]Premium ABS material with silicone ring, non-toxic, safe, and effective for using. [Strong Functions]Can help to enlarge breast, as well as improve blood circulation. [Comfortable Using]Healthy massage for comfortable enjoyment. With silicone ring for skin-friendly use. 2 sizes of cup for selection. [2 Gears Vacuum Suction]Electric vacuum suction with 2 gears adjustable ensures strength in control, meeting varied needs. [Easy for Using]Electric design ensures auto vacuum enhancer just by pushing the button, convenient and labour-saving for using. Specification: Material: ABS, silicone Power supply: USB charging BatterMaterial: ABS, silicone Power supply: USB charging Battery capacity: 1200mAh Charging time: 4-5 hours Using time: continuously 3.5 hours Charging indicator: red light on while charging, green light on when fully charged Cup diameter: 13.3cm or 12.5cmy capacity: 1200mAh Charging time: 4-5 hours Using time: continuously 3.5 hours Charging indicator: red light on while charging, green light on when fully charged Cup diameter: 13cm or 12cm Package Content: Pack with Air column bag 1 x main device 1 x cup 1 x silicone ring 1 x USB cable