I did some research some time ago into it and the consensus was overwhelmingly towards the derminator as opposed to the Dr.Pen. I couldn't find too many experiences using the Dr.Pen so I decided to wasn't worth the risk of permanently damaging my skin at the sake of postage times and cost. That said I was also looking at it to remove some acne scars I had alongside regrowing my hair meaning that the potential crudeness of it won't be as irrelevant for someplace such as the scalp. You'd be probably safe enough to actually use it but I'd just be careful, micro tearing is caused by horizontal incisions, you want the needle to pierce vertically to minimize any potential long term damage and decrease the time it takes to heal. If you take it slow I can't imagine the risk would be too high. It's also worth noting that derma rollers actually can cause micro tearing too and even derma stamps although much lesser.
I was looking at the instruction manual for a Dr.Pen and it literally has a typo in it, there was also a bunch of gramatical errors throughout. I understand they are made in China but their quality control had me a little worried considering it's an electronic needle that has the potential to cause permanent damage.
https://s3-ap-southeast-1.amazonaws...8/08/15/t563vky3cf574p7y/16d952f1a8c8e207.jpg Like they literally typo "battery" as "bettery" after literally just typing it correctly on the line above, like how?