application:Just change the needle. The length of the needle can be adjusted to different sizes depending on the area.It is more convenient to treat narrow areas such as the nose, around the eyes or in the mouth.feature:Item: for N2 M5 M7 E30 needleNeedle type: 9/12/24/36/42/nano/5D/3D/nanosiliconeNumber of stitches: 10 / 50 stitches, excluding box and machine.It is an electronic automatic microneedle with guide rails that can adjust the needle length.It is hygienic, comfortable and safe.benefit:1. Minimize epidermal damage2. Less pain and less erythema at high speed in the vertical direction.3. Easier to operate in small or curved areas4. Disposable needles5. Faster and more efficient than manual microneedling6, the treatment effect is obvious7. Short curing time.8. No permanent damage or injury.9. No bruising, infection, discoloration or other complications.10. The absorption rate of any active ingredient is extremely high.11. Almost all skin types can be treated.12. Thickens the dermis without damaging or removing the epidermis.