This machine is equipped with an intelligent lock. If too much hair in the pre cutter head causes rotor blockage, the machine is about to run out of power, overcharge, press the switch to drag, etc., the intelligent lock will automatically start. Press the switch for 3-4 seconds (or press the switch until the indicator light flashes continuously), do not let go, and then turn on the machine to unlock!Product Name: Lady Electric ShaverPower Supply:Rechargeable Battery, USB charging lithium batteryCharging Time:Fast charging in 2 hourBattery:3.7V lithium batteryHead:Removable cutter head, convenient and cleanApplications:Suitable for limbs,underarms or short shaving,etc.Packing list: 1* Electric Hair RemoverTips:The subtle difference between the picture and the actual object is caused by the brightness of the light. Thank you for your understanding.※ Your arrival is my honor, thank you for your trust and support, If you have any questions, feel free to contact us and we will provide you with the best service.