Smart Nipple Pump 6Mode Vacuum Nipple Stimulator Pussy Pump for Women SM Female Masturbator Adult Sex Toys Face Cupping Massager Material:Silicone Size: Nipple cup size S: 2.6 inches high and 0.6 inches inside diameter Nipple cup size M: 2.6 inches high and 0.75 inches inside diameter Nipple cup size L: 3.0 inches high with an inside diameter of 1.0 inches Nipple cup size XL: height 3.0 inches inside diameter 1.2 inches Smart Pump How to use: On/Off key: Long press to switch on/off Short press: start/stop pumping Release key: one key to deflate Smart key: Long press: Press and hold the Smart Button for 3 seconds, remember/delete the selected vacuum degree Short press: select 6 kinds of intelligent modes. The six smart modes are as follows: Smart mode 1: Pump air to the set maximum value, and then immediately release all air, and cycle automatically for 20 minutes. Smart mode 2-5: According to the set maximum value,the free variable frequency pumping and air releasing cycle will be performed, and it will automatically stop after 20 minutes. Smart Mode 6: Pump air to the set maximum value, hold the pressure for 1 minute,then release all air, and cycle automatically for 20 minutes. 6. in smart mode, you can click Power Button or Air Release Button at any time to return toManual mode.