Charging port precautionsDue to the curved position of the charging connector, please insert it at a certain angle, otherwise the charging cable cannot be inserted.How to vibrateThe cover on the head of the device, please remove it before use. This product is set by the human body induction switch. When using it, please touch the head of the device to your skin and touch one of the silver induction "rings" on both sides with both hands so that the vibration works (you can save more power! It will not work when charging, and it will not work when charging! ).Warm TipsWhen charging, if the power is insufficient, the charging indicator will light up and flash. If it is fully charged, it will stop flashing and always stay on (not available when charging! It will not work when charging! )