HydraPen H2 Professional Microneedling Pen Needle Microneedle Cartridges Wireless DermaPenOperation of Traditional Dermapen When we use the traditional derampen to treat the skin with a microneedle, the serum needs to be applied with another hand, or after the microneedling,apply the serum. Traditional dermapen microneedling treatment requires higher requirements for operation and more time. More Convenient and Time Saving Operation Integrated design of the Hydrapen, the skin can be micro needle treatment while the serum is applied. This