I have bought this Machine FOUR Times for myself and my Trainees. I’ve been a PMU Artist for over 3yrs now and used several machines, This one is by far MY FAVOURITE one. I honestly don’t even care about the needles in the package bcos I buy bulk 1RL needles from Aliexpress, since I do lots of work (2 clients a day- 6 days a week) and this machine DOES NOT FAIL ME once. And to my students, I give them lots of needles regardless of what the machine comes with too. However I’ve tried the needles in the pack once when I ran out of needle and it WORKED great.
I only needed to adjust the setting a bit differently to what I was comfortable working with, but it did the job nicely.
I have NEVER used the battery more than 2-3 times during training so I wouldn’t know how long it last but during my 4-6 hours of use each time, it WORKED WELL with same vibration I’ll expect from direct power.