Bio Pen is a beauty instrument that integrates microneedling, EMS electroporation, and LED skin care.It is suitable for beauty salons and home-use. Equipped with an induction base, it stops when the pen is placed and starts when it is off the base. It can meet the needs of skin care, hair growth and beard growth etc. You need not to buy a new one every time.Just replace the needle.Needle length is adjustable from 0 mm to 1.5mm.It is more convenient to treat narrow areas such as nose, around eye or mouth.Besides,the vibration speed can be controlled in 5 levels..syi