???After-Sales & Warranty?:1 *PELCAS microneedle pen, 24 Pcs(10*12Pin + 10*36Pin + 4*Nano )replacement cartridges, 1 *USB charge cable, 1* User manual. PELCAS provides 12 months warranty and 30 days unreasonable return, 24 hours online after-sales service. If you have any questions, please let us know and we will give you a satisfactory result within 8H. ???Replacement Needle?:Cartridges are disposable, sharing cartridges with others is banned. If the vacuum packaging leaks, please do not use it and contact the customer immediately for replacement. Please purchase PELCAS Original replacement needle. ???Three Gears & Precise Scale?: The number of revolutions corresponding to the three gears: 8000-12000-16000RPM, needle adjustment length: 0-2mm, it is recommended to start using the low gear, redness and swelling after use is normal, the next day disappear. Do not stay in the same place for 3-5 seconds during use. ???Economy & Health?:Save the money and time you spend on going to the beauty salon, PELCAS microneeding pen just need to recharge the pen and replace cartridges after every use. Frequency of use, twice a week. thin horny once a week. Each use time is within 5-10 minutes. needle length 0.25mm. ???Use Application?: PELCAS Cordless electric microneedling pen weight is 87g and the size is 150*20*20mm. Suitable for traveling carrying, micorneedling pen with Large capacity , it can be charged for about 1.5H hours and can be used for 3 hours. Only one button is easy to use, you need to read the precautions in the manual before use. Use PELCAS microneedle pen kit in the comfort of your own at home.