The Derma pen is automatic and rechargeable,It is easy to use,you don`t have to buy a new one every tome,Just replace the needle.Needle legth is adjustable to different sizes depend on the areas and purposes of the treatment.It is more convenient to treat narrow area such as nose,around eye or mouth.
<br />Voltage: 110~220V, 50/60Hz
<br />Adapter: 4.2V,500mA
<br />Needles Length size:  0.25mm,0.5mm,1.0mm,1.5mm,2.0mm
<br />Speed: 1000-6000 Cycles/min