Officials said 32-year-old Daniel Fleischauer pleaded guilty on Thursday to the charge.
According to court documents and statements made in court, between 2013 and 2017, Fleischauer communicated with girls on online apps.
Officials said that during these communications, he sent sexually explicit images of himself to the girls. He also allegedly requested and received images and videos of the girls engaged in sexually explicit conduct.
Authorities said Fleischauer believed that one of the girls was under the age of 12.
He has been detained since his arrest on Dec. 13th, 2017.